diff --git a/pom.xml b/pom.xml
index 18728b29..51f49581 100644
--- a/pom.xml
+++ b/pom.xml
@@ -212,6 +212,18 @@ SOFTWARE.
       <version>0.7.1</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.languagetool</groupId>
+      <artifactId>language-en</artifactId>
+      <version>6.5</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.jcabi</groupId>
+      <artifactId>jcabi-matchers</artifactId>
+      <version>1.8.0</version>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
   <profiles>
     <profile>
diff --git a/src/main/resources/org/eolang/funcs/escape.xsl b/src/main/resources/org/eolang/funcs/escape.xsl
new file mode 100644
index 00000000..8bf026fa
--- /dev/null
+++ b/src/main/resources/org/eolang/funcs/escape.xsl
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+The MIT License (MIT)
+
+Copyright (c) 2016-2024 Objectionary.com
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+-->
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" xmlns:xs="http://www.w3.org/2001/XMLSchema" id="escape" version="2.0">
+  <xsl:function name="eo:escape" as="xs:string">
+    <xsl:param name="text"/>
+    <xsl:value-of select="concat('&quot;', replace(replace($text, ' ', '⌴'), '&quot;', '\\x22'), '&quot;')"/>
+  </xsl:function>
+</xsl:stylesheet>
diff --git a/src/main/resources/org/eolang/lints/aliases/alias-too-long.xsl b/src/main/resources/org/eolang/lints/aliases/alias-too-long.xsl
index 41c654af..370c328a 100644
--- a/src/main/resources/org/eolang/lints/aliases/alias-too-long.xsl
+++ b/src/main/resources/org/eolang/lints/aliases/alias-too-long.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="alias-too-long" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -36,9 +37,8 @@ SOFTWARE.
             <xsl:attribute name="severity">
               <xsl:text>error</xsl:text>
             </xsl:attribute>
-            <xsl:text>The alias has too many parts: "</xsl:text>
-            <xsl:value-of select="tail"/>
-            <xsl:text>"</xsl:text>
+            <xsl:text>The alias has too many parts: </xsl:text>
+            <xsl:value-of select="eo:escape(tail)"/>
           </xsl:element>
         </xsl:if>
       </xsl:for-each>
diff --git a/src/main/resources/org/eolang/lints/aliases/broken-alias-first.xsl b/src/main/resources/org/eolang/lints/aliases/broken-alias-first.xsl
index 741d4a06..aa0c6ec8 100644
--- a/src/main/resources/org/eolang/lints/aliases/broken-alias-first.xsl
+++ b/src/main/resources/org/eolang/lints/aliases/broken-alias-first.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="broken-alias-first" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -36,9 +37,9 @@ SOFTWARE.
             <xsl:attribute name="severity">
               <xsl:text>error</xsl:text>
             </xsl:attribute>
-            <xsl:text>The first part of the alias is invalid: "</xsl:text>
-            <xsl:value-of select="part[1]"/>
-            <xsl:text>" (it may only contain a relative name of the object, not its FQN)</xsl:text>
+            <xsl:text>The first part of the alias is invalid: </xsl:text>
+            <xsl:value-of select="eo:escape(part[1])"/>
+            <xsl:text> (it may only contain a relative name of the object, not its FQN)</xsl:text>
           </xsl:element>
         </xsl:if>
       </xsl:for-each>
diff --git a/src/main/resources/org/eolang/lints/aliases/broken-alias-second.xsl b/src/main/resources/org/eolang/lints/aliases/broken-alias-second.xsl
index 8c340575..aec86023 100644
--- a/src/main/resources/org/eolang/lints/aliases/broken-alias-second.xsl
+++ b/src/main/resources/org/eolang/lints/aliases/broken-alias-second.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="broken-alias-second" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -36,9 +37,9 @@ SOFTWARE.
             <xsl:attribute name="severity">
               <xsl:text>error</xsl:text>
             </xsl:attribute>
-            <xsl:text>The second part of the alias is invalid: "</xsl:text>
-            <xsl:value-of select="part[2]"/>
-            <xsl:text>" (it may only contain FQN)</xsl:text>
+            <xsl:text>The second part of the alias is invalid: </xsl:text>
+            <xsl:value-of select="eo:escape(part[2])"/>
+            <xsl:text> (it may only contain FQN)</xsl:text>
           </xsl:element>
         </xsl:if>
       </xsl:for-each>
diff --git a/src/main/resources/org/eolang/lints/aliases/duplicate-aliases.xsl b/src/main/resources/org/eolang/lints/aliases/duplicate-aliases.xsl
index 5953ff85..0de729f0 100644
--- a/src/main/resources/org/eolang/lints/aliases/duplicate-aliases.xsl
+++ b/src/main/resources/org/eolang/lints/aliases/duplicate-aliases.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="duplicate-aliases" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -37,9 +38,9 @@ SOFTWARE.
             <xsl:attribute name="severity">
               <xsl:text>error</xsl:text>
             </xsl:attribute>
-            <xsl:text>The alias "</xsl:text>
-            <xsl:value-of select="$name"/>
-            <xsl:text>" is duplicated</xsl:text>
+            <xsl:text>The alias </xsl:text>
+            <xsl:value-of select="eo:escape($name)"/>
+            <xsl:text> is duplicated</xsl:text>
           </xsl:element>
         </xsl:if>
       </xsl:for-each>
@@ -56,9 +57,9 @@ SOFTWARE.
           <xsl:attribute name="severity">
             <xsl:text>error</xsl:text>
           </xsl:attribute>
-          <xsl:text>The name "</xsl:text>
-          <xsl:value-of select="@name"/>
-          <xsl:text>" is already in use</xsl:text>
+          <xsl:text>The name </xsl:text>
+          <xsl:value-of select="eo:escape(@name)"/>
+          <xsl:text> is already in use</xsl:text>
         </error>
       </xsl:if>
     </xsl:for-each>
diff --git a/src/main/resources/org/eolang/lints/aliases/unused-alias.xsl b/src/main/resources/org/eolang/lints/aliases/unused-alias.xsl
index 9f34d635..fab6480e 100644
--- a/src/main/resources/org/eolang/lints/aliases/unused-alias.xsl
+++ b/src/main/resources/org/eolang/lints/aliases/unused-alias.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="unused-alias" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -37,11 +38,10 @@ SOFTWARE.
             <xsl:attribute name="severity">
               <xsl:text>error</xsl:text>
             </xsl:attribute>
-            <xsl:text>The alias "</xsl:text>
-            <xsl:value-of select="$name"/>
-            <xsl:text>" is not used, but defined as "+alias </xsl:text>
-            <xsl:value-of select="tail"/>
-            <xsl:text>"</xsl:text>
+            <xsl:text>The alias </xsl:text>
+            <xsl:value-of select="eo:escape($name)"/>
+            <xsl:text> is not used, but defined as </xsl:text>
+            <xsl:value-of select="eo:escape(tail)"/>
           </xsl:element>
         </xsl:if>
       </xsl:for-each>
diff --git a/src/main/resources/org/eolang/lints/atoms/atom-and-base.xsl b/src/main/resources/org/eolang/lints/atoms/atom-and-base.xsl
index f29ec2a1..037f443d 100644
--- a/src/main/resources/org/eolang/lints/atoms/atom-and-base.xsl
+++ b/src/main/resources/org/eolang/lints/atoms/atom-and-base.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="atom-and-base" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -35,11 +36,10 @@ SOFTWARE.
           <xsl:attribute name="severity">
             <xsl:text>critical</xsl:text>
           </xsl:attribute>
-          <xsl:text>The atom "</xsl:text>
-          <xsl:value-of select="@name"/>
-          <xsl:text>" may not have the "@base" attribute, which however exists with "</xsl:text>
-          <xsl:value-of select="@base"/>
-          <xsl:text>"</xsl:text>
+          <xsl:text>The atom </xsl:text>
+          <xsl:value-of select="eo:escape(@name)"/>
+          <xsl:text> may not have the "@base" attribute, which however exists with </xsl:text>
+          <xsl:value-of select="eo:escape(@base)"/>
         </xsl:element>
       </xsl:for-each>
     </defects>
diff --git a/src/main/resources/org/eolang/lints/atoms/atom-in-atom.xsl b/src/main/resources/org/eolang/lints/atoms/atom-in-atom.xsl
index bb1da3e1..07f7f5c8 100644
--- a/src/main/resources/org/eolang/lints/atoms/atom-in-atom.xsl
+++ b/src/main/resources/org/eolang/lints/atoms/atom-in-atom.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="atom-in-atom" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -35,16 +36,14 @@ SOFTWARE.
           <xsl:attribute name="severity">
             <xsl:text>error</xsl:text>
           </xsl:attribute>
-          <xsl:text>Atom "</xsl:text>
-          <xsl:value-of select="@name"/>
-          <xsl:text>" may not have any attributes, even if they are atoms, which however exist: </xsl:text>
+          <xsl:text>Atom </xsl:text>
+          <xsl:value-of select="eo:escape(@name)"/>
+          <xsl:text> may not have any attributes, even if they are atoms, which however exist: </xsl:text>
           <xsl:for-each select="o[@atom]">
             <xsl:if test="position() &gt; 1">
               <xsl:text>, </xsl:text>
             </xsl:if>
-            <xsl:text>"</xsl:text>
-            <xsl:value-of select="@name"/>
-            <xsl:text>"</xsl:text>
+            <xsl:value-of select="eo:escape(@name)"/>
           </xsl:for-each>
         </xsl:element>
       </xsl:for-each>
diff --git a/src/main/resources/org/eolang/lints/atoms/atom-without-rt.xsl b/src/main/resources/org/eolang/lints/atoms/atom-without-rt.xsl
index bab30c6b..7b72c983 100644
--- a/src/main/resources/org/eolang/lints/atoms/atom-without-rt.xsl
+++ b/src/main/resources/org/eolang/lints/atoms/atom-without-rt.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="atom-without-rt" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -36,9 +37,9 @@ SOFTWARE.
             <xsl:attribute name="severity">
               <xsl:text>error</xsl:text>
             </xsl:attribute>
-            <xsl:text>The "</xsl:text>
-            <xsl:value-of select="@name"/>
-            <xsl:text>" atom is defined without the +rt meta, which doesn't make any sense</xsl:text>
+            <xsl:text>The </xsl:text>
+            <xsl:value-of select="eo:escape(@name)"/>
+            <xsl:text> atom is defined without the +rt meta, which doesn't make any sense</xsl:text>
           </xsl:element>
         </xsl:for-each>
       </xsl:if>
diff --git a/src/main/resources/org/eolang/lints/atoms/not-empty-atom.xsl b/src/main/resources/org/eolang/lints/atoms/not-empty-atom.xsl
index 2123ed09..8bfc255d 100644
--- a/src/main/resources/org/eolang/lints/atoms/not-empty-atom.xsl
+++ b/src/main/resources/org/eolang/lints/atoms/not-empty-atom.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="not-empty-atom" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -35,16 +36,14 @@ SOFTWARE.
           <xsl:attribute name="severity">
             <xsl:text>error</xsl:text>
           </xsl:attribute>
-          <xsl:text>The atom "</xsl:text>
-          <xsl:value-of select="@name"/>
-          <xsl:text>" may not have any attributes, which however exist: </xsl:text>
+          <xsl:text>The atom </xsl:text>
+          <xsl:value-of select="eo:escape(@name)"/>
+          <xsl:text> may not have any attributes, which however exist: </xsl:text>
           <xsl:for-each select="o[@base]">
             <xsl:if test="position() &gt; 1">
               <xsl:text>, </xsl:text>
             </xsl:if>
-            <xsl:text>"</xsl:text>
-            <xsl:value-of select="@name"/>
-            <xsl:text>"</xsl:text>
+            <xsl:value-of select="eo:escape(@name)"/>
           </xsl:for-each>
         </xsl:element>
       </xsl:for-each>
diff --git a/src/main/resources/org/eolang/lints/comments/comment-is-too-wide.xsl b/src/main/resources/org/eolang/lints/comments/comment-is-too-wide.xsl
index 7f5b0b42..0946322a 100644
--- a/src/main/resources/org/eolang/lints/comments/comment-is-too-wide.xsl
+++ b/src/main/resources/org/eolang/lints/comments/comment-is-too-wide.xsl
@@ -41,11 +41,11 @@ SOFTWARE.
                 <xsl:attribute name="severity">
                   <xsl:text>warning</xsl:text>
                 </xsl:attribute>
-                <xsl:text>The comment line width is "</xsl:text>
+                <xsl:text>The comment line width is </xsl:text>
                 <xsl:value-of select="string-length(.)"/>
-                <xsl:text>", while "</xsl:text>
+                <xsl:text>, while </xsl:text>
                 <xsl:value-of select="$max"/>
-                <xsl:text>" is max allowed</xsl:text>
+                <xsl:text> is max allowed</xsl:text>
               </xsl:element>
             </xsl:for-each>
           </xsl:when>
@@ -58,11 +58,11 @@ SOFTWARE.
                 <xsl:attribute name="severity">
                   <xsl:text>warning</xsl:text>
                 </xsl:attribute>
-                <xsl:text>The comment width is "</xsl:text>
+                <xsl:text>The comment width is </xsl:text>
                 <xsl:value-of select="string-length(.)"/>
-                <xsl:text>", while "</xsl:text>
+                <xsl:text>, while </xsl:text>
                 <xsl:value-of select="$max"/>
-                <xsl:text>" is max allowed</xsl:text>
+                <xsl:text> is max allowed</xsl:text>
               </xsl:element>
             </xsl:if>
           </xsl:otherwise>
diff --git a/src/main/resources/org/eolang/lints/critical/atom-with-data.xsl b/src/main/resources/org/eolang/lints/critical/atom-with-data.xsl
index 2f66f8e3..99d1e105 100644
--- a/src/main/resources/org/eolang/lints/critical/atom-with-data.xsl
+++ b/src/main/resources/org/eolang/lints/critical/atom-with-data.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="atom-with-data" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -38,9 +39,8 @@ SOFTWARE.
           <xsl:value-of select="eo:lineno(@line)"/>
         </xsl:attribute>
         <xsl:attribute name="severity">critical</xsl:attribute>
-        <xsl:text>Atoms must not contain data, while this object contains "</xsl:text>
-        <xsl:value-of select="$data"/>
-        <xsl:text>"</xsl:text>
+        <xsl:text>Atoms must not contain data, while this object contains </xsl:text>
+        <xsl:value-of select="eo:escape($data)"/>
       </defect>
     </xsl:if>
   </xsl:template>
diff --git a/src/main/resources/org/eolang/lints/critical/duplicate-names.xsl b/src/main/resources/org/eolang/lints/critical/duplicate-names.xsl
index 484cf1bd..98d1e7f2 100644
--- a/src/main/resources/org/eolang/lints/critical/duplicate-names.xsl
+++ b/src/main/resources/org/eolang/lints/critical/duplicate-names.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="duplicate-names" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -43,9 +44,9 @@ SOFTWARE.
           <xsl:attribute name="severity">
             <xsl:text>critical</xsl:text>
           </xsl:attribute>
-          <xsl:text>The name "</xsl:text>
-          <xsl:value-of select="@name"/>
-          <xsl:text>" is already in use</xsl:text>
+          <xsl:text>The name </xsl:text>
+          <xsl:value-of select="eo:escape(@name)"/>
+          <xsl:text> is already in use</xsl:text>
         </xsl:element>
       </xsl:if>
     </xsl:for-each>
diff --git a/src/main/resources/org/eolang/lints/critical/incorrect-bytes-format.xsl b/src/main/resources/org/eolang/lints/critical/incorrect-bytes-format.xsl
index c20820bc..145d2e8a 100644
--- a/src/main/resources/org/eolang/lints/critical/incorrect-bytes-format.xsl
+++ b/src/main/resources/org/eolang/lints/critical/incorrect-bytes-format.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" version="2.0" id="incorrect-bytes-format">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -38,9 +39,8 @@ SOFTWARE.
           <xsl:value-of select="eo:lineno(@line)"/>
         </xsl:attribute>
         <xsl:attribute name="severity">critical</xsl:attribute>
-        <xsl:text>The format of bytes is incorrect: "</xsl:text>
-        <xsl:value-of select="$bytes"/>
-        <xsl:text>"</xsl:text>
+        <xsl:text>The format of bytes is incorrect: </xsl:text>
+        <xsl:value-of select="eo:escape($bytes)"/>
       </defect>
     </xsl:if>
   </xsl:template>
diff --git a/src/main/resources/org/eolang/lints/critical/object-has-data.xsl b/src/main/resources/org/eolang/lints/critical/object-has-data.xsl
index c9e78c34..1243f830 100644
--- a/src/main/resources/org/eolang/lints/critical/object-has-data.xsl
+++ b/src/main/resources/org/eolang/lints/critical/object-has-data.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" version="2.0" id="object-has-data">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -38,7 +39,8 @@ SOFTWARE.
           <xsl:value-of select="eo:lineno(@line)"/>
         </xsl:attribute>
         <xsl:attribute name="severity">critical</xsl:attribute>
-        <xsl:text>Only objects with their @base attributes containing 'org.eolang.bytes' may contain data, while this object doesn't have @base attribute at all</xsl:text>
+        <xsl:text>Only objects with their @base attributes containing "org.eolang.bytes" may contain data, </xsl:text>
+        <xsl:text>while this object doesn't have @base attribute at all</xsl:text>
       </defect>
     </xsl:if>
     <xsl:if test="$data != '' and @base and not(@base = 'bytes' or @base = 'org.eolang.bytes')">
@@ -47,9 +49,9 @@ SOFTWARE.
           <xsl:value-of select="eo:lineno(@line)"/>
         </xsl:attribute>
         <xsl:attribute name="severity">critical</xsl:attribute>
-        <xsl:text>Only objects with their @base attributes containing 'org.eolang.bytes' may contain data, while this object contains "</xsl:text>
-        <xsl:value-of select="$data"/>
-        <xsl:text>"</xsl:text>
+        <xsl:text>Only objects with their @base attributes containing "org.eolang.bytes" may contain data, </xsl:text>
+        <xsl:text>while this object contains </xsl:text>
+        <xsl:value-of select="eo:escape($data)"/>
       </defect>
     </xsl:if>
   </xsl:template>
diff --git a/src/main/resources/org/eolang/lints/critical/pos-without-line.xsl b/src/main/resources/org/eolang/lints/critical/pos-without-line.xsl
index 2bfe9ea3..28144e12 100644
--- a/src/main/resources/org/eolang/lints/critical/pos-without-line.xsl
+++ b/src/main/resources/org/eolang/lints/critical/pos-without-line.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="pos-without-line" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -35,9 +36,9 @@ SOFTWARE.
           <xsl:attribute name="severity">
             <xsl:text>critical</xsl:text>
           </xsl:attribute>
-          <xsl:text>Object "</xsl:text>
+          <xsl:text>Object </xsl:text>
           <xsl:value-of select="@name"/>
-          <xsl:text>" have '@pos', but '@line' is absent</xsl:text>
+          <xsl:text> have the "@pos" attribute, but the "@line" attribute is absent</xsl:text>
         </xsl:element>
       </xsl:for-each>
     </defects>
diff --git a/src/main/resources/org/eolang/lints/critical/same-line-names.xsl b/src/main/resources/org/eolang/lints/critical/same-line-names.xsl
index ee447364..1702e124 100644
--- a/src/main/resources/org/eolang/lints/critical/same-line-names.xsl
+++ b/src/main/resources/org/eolang/lints/critical/same-line-names.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="same-line-names" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -42,9 +43,9 @@ SOFTWARE.
         <xsl:attribute name="severity">
           <xsl:text>error</xsl:text>
         </xsl:attribute>
-        <xsl:text>The name "</xsl:text>
-        <xsl:value-of select="@name"/>
-        <xsl:text>" has been used twice on line no.</xsl:text>
+        <xsl:text>The name </xsl:text>
+        <xsl:value-of select="eo:escape(@name)"/>
+        <xsl:text> has been used twice on line no.</xsl:text>
         <xsl:value-of select="eo:lineno(@line)"/>
       </xsl:element>
     </xsl:for-each>
diff --git a/src/main/resources/org/eolang/lints/critical/schema-is-absent.xsl b/src/main/resources/org/eolang/lints/critical/schema-is-absent.xsl
index 4d901de5..321a4de6 100644
--- a/src/main/resources/org/eolang/lints/critical/schema-is-absent.xsl
+++ b/src/main/resources/org/eolang/lints/critical/schema-is-absent.xsl
@@ -39,7 +39,7 @@ SOFTWARE.
         <xsl:text>critical</xsl:text>
       </xsl:attribute>
       <xsl:text>There is no XSD schema attached to the XML document, </xsl:text>
-      <xsl:text>while xsi:noNamespaceSchemaLocation is expected</xsl:text>
+      <xsl:text>while "xsi:noNamespaceSchemaLocation" is expected</xsl:text>
     </xsl:element>
   </xsl:template>
 </xsl:stylesheet>
diff --git a/src/main/resources/org/eolang/lints/critical/self-naming.xsl b/src/main/resources/org/eolang/lints/critical/self-naming.xsl
index 4c6f569f..e52fc1ff 100644
--- a/src/main/resources/org/eolang/lints/critical/self-naming.xsl
+++ b/src/main/resources/org/eolang/lints/critical/self-naming.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" xmlns:xs="http://www.w3.org/2001/XMLSchema" id="self-naming" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <!-- x > x -->
   <xsl:function name="eo:base-eq-name" as="xs:boolean">
@@ -55,9 +56,9 @@ SOFTWARE.
           <xsl:attribute name="severity">
             <xsl:text>error</xsl:text>
           </xsl:attribute>
-          <xsl:text>The object "</xsl:text>
-          <xsl:value-of select="@base"/>
-          <xsl:text>" can't copy itself</xsl:text>
+          <xsl:text>The object </xsl:text>
+          <xsl:value-of select="eo:escape(@base)"/>
+          <xsl:text> can't copy itself</xsl:text>
         </xsl:element>
       </xsl:for-each>
     </defects>
diff --git a/src/main/resources/org/eolang/lints/critical/unknown-rt.xsl b/src/main/resources/org/eolang/lints/critical/unknown-rt.xsl
index cb749971..63f01ea7 100644
--- a/src/main/resources/org/eolang/lints/critical/unknown-rt.xsl
+++ b/src/main/resources/org/eolang/lints/critical/unknown-rt.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="unknown-rt" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -49,16 +50,14 @@ SOFTWARE.
             <xsl:attribute name="severity">
               <xsl:text>critical</xsl:text>
             </xsl:attribute>
-            <xsl:text>The runtime "</xsl:text>
-            <xsl:value-of select="$first"/>
-            <xsl:text>" is not supported (only </xsl:text>
+            <xsl:text>The runtime </xsl:text>
+            <xsl:value-of select="eo:escape($first)"/>
+            <xsl:text> is not supported (only </xsl:text>
             <xsl:for-each select="$allowed">
               <xsl:if test="position() &gt; 1">
                 <xsl:text>, </xsl:text>
               </xsl:if>
-              <xsl:text>"</xsl:text>
-              <xsl:value-of select="."/>
-              <xsl:text>"</xsl:text>
+              <xsl:value-of select="eo:escape(.)"/>
             </xsl:for-each>
             <xsl:text>)</xsl:text>
           </xsl:element>
diff --git a/src/main/resources/org/eolang/lints/errors/empty-object.xsl b/src/main/resources/org/eolang/lints/errors/empty-object.xsl
index 6f0c54a4..bd8ef359 100644
--- a/src/main/resources/org/eolang/lints/errors/empty-object.xsl
+++ b/src/main/resources/org/eolang/lints/errors/empty-object.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="empty-object" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -39,9 +40,7 @@ SOFTWARE.
           <xsl:choose>
             <xsl:when test="@name">
               <xsl:text>object </xsl:text>
-              <xsl:text>"</xsl:text>
-              <xsl:value-of select="@name"/>
-              <xsl:text>"</xsl:text>
+              <xsl:value-of select="eo:escape(@name)"/>
             </xsl:when>
             <xsl:otherwise>
               <xsl:text>anonymous object</xsl:text>
diff --git a/src/main/resources/org/eolang/lints/errors/many-free-attributes.xsl b/src/main/resources/org/eolang/lints/errors/many-free-attributes.xsl
index fe41ac41..20172703 100644
--- a/src/main/resources/org/eolang/lints/errors/many-free-attributes.xsl
+++ b/src/main/resources/org/eolang/lints/errors/many-free-attributes.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="many-free-attributes" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:variable name="max" select="5"/>
   <xsl:template match="/">
@@ -37,10 +38,8 @@ SOFTWARE.
             <xsl:text>warning</xsl:text>
           </xsl:attribute>
           <xsl:text>The object </xsl:text>
-          <xsl:text>"</xsl:text>
-          <xsl:value-of select="@name"/>
-          <xsl:text>" </xsl:text>
-          <xsl:text>has more than </xsl:text>
+          <xsl:value-of select="eo:escape(@name)"/>
+          <xsl:text> has more than </xsl:text>
           <xsl:value-of select="$max"/>
           <xsl:text> free attributes, it's too many</xsl:text>
         </xsl:element>
diff --git a/src/main/resources/org/eolang/lints/errors/noname-attribute.xsl b/src/main/resources/org/eolang/lints/errors/noname-attribute.xsl
index 173d1fb0..28ae8bd0 100644
--- a/src/main/resources/org/eolang/lints/errors/noname-attribute.xsl
+++ b/src/main/resources/org/eolang/lints/errors/noname-attribute.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="noname-attribute" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:import href="/org/eolang/parser/_funcs.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
@@ -44,9 +45,8 @@ SOFTWARE.
         </xsl:attribute>
         <xsl:text>The object </xsl:text>
         <xsl:if test="@name">
-          <xsl:text>"</xsl:text>
-          <xsl:value-of select="@name"/>
-          <xsl:text>" </xsl:text>
+          <xsl:value-of select="eo:escape(@name)"/>
+          <xsl:text> </xsl:text>
         </xsl:if>
         <xsl:text>has an attribute without a name</xsl:text>
       </xsl:element>
diff --git a/src/main/resources/org/eolang/lints/errors/unknown-name.xsl b/src/main/resources/org/eolang/lints/errors/unknown-name.xsl
index 58c38216..55b131d0 100644
--- a/src/main/resources/org/eolang/lints/errors/unknown-name.xsl
+++ b/src/main/resources/org/eolang/lints/errors/unknown-name.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="unknown-name" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -35,9 +36,9 @@ SOFTWARE.
           <xsl:attribute name="severity">
             <xsl:text>error</xsl:text>
           </xsl:attribute>
-          <xsl:text>The object "</xsl:text>
-          <xsl:value-of select="@base"/>
-          <xsl:text>" is not defined anywhere</xsl:text>
+          <xsl:text>The object </xsl:text>
+          <xsl:value-of select="eo:escape(@base)"/>
+          <xsl:text> is not defined anywhere</xsl:text>
         </xsl:element>
       </xsl:for-each>
     </defects>
diff --git a/src/main/resources/org/eolang/lints/lines/error-line-out-of-listing.xsl b/src/main/resources/org/eolang/lints/lines/error-line-out-of-listing.xsl
index a492ed30..99cf1ed4 100644
--- a/src/main/resources/org/eolang/lints/lines/error-line-out-of-listing.xsl
+++ b/src/main/resources/org/eolang/lints/lines/error-line-out-of-listing.xsl
@@ -36,9 +36,9 @@ SOFTWARE.
           <xsl:attribute name="severity">
             <xsl:text>error</xsl:text>
           </xsl:attribute>
-          <xsl:text>The line "</xsl:text>
+          <xsl:text>The line </xsl:text>
           <xsl:value-of select="eo:lineno(@line)"/>
-          <xsl:text>" is out of listing, which contains only </xsl:text>
+          <xsl:text> is out of listing, which contains only </xsl:text>
           <xsl:value-of select="$max"/>
           <xsl:text> lines</xsl:text>
         </xsl:element>
diff --git a/src/main/resources/org/eolang/lints/lines/meta-line-out-of-listing.xsl b/src/main/resources/org/eolang/lints/lines/meta-line-out-of-listing.xsl
index fac6e6cf..a751c62c 100644
--- a/src/main/resources/org/eolang/lints/lines/meta-line-out-of-listing.xsl
+++ b/src/main/resources/org/eolang/lints/lines/meta-line-out-of-listing.xsl
@@ -36,9 +36,9 @@ SOFTWARE.
           <xsl:attribute name="severity">
             <xsl:text>error</xsl:text>
           </xsl:attribute>
-          <xsl:text>The line "</xsl:text>
+          <xsl:text>The line </xsl:text>
           <xsl:value-of select="eo:lineno(@line)"/>
-          <xsl:text>" is out of listing, which contains only </xsl:text>
+          <xsl:text> is out of listing, which contains only </xsl:text>
           <xsl:value-of select="$max"/>
           <xsl:text> lines</xsl:text>
         </xsl:element>
diff --git a/src/main/resources/org/eolang/lints/lines/object-line-out-of-listing.xsl b/src/main/resources/org/eolang/lints/lines/object-line-out-of-listing.xsl
index 17e3e414..c1fad492 100644
--- a/src/main/resources/org/eolang/lints/lines/object-line-out-of-listing.xsl
+++ b/src/main/resources/org/eolang/lints/lines/object-line-out-of-listing.xsl
@@ -36,9 +36,9 @@ SOFTWARE.
           <xsl:attribute name="severity">
             <xsl:text>error</xsl:text>
           </xsl:attribute>
-          <xsl:text>The line "</xsl:text>
+          <xsl:text>The line </xsl:text>
           <xsl:value-of select="eo:lineno(@line)"/>
-          <xsl:text>" is out of listing, which contains only </xsl:text>
+          <xsl:text> is out of listing, which contains only </xsl:text>
           <xsl:value-of select="$max"/>
           <xsl:text> lines</xsl:text>
         </xsl:element>
diff --git a/src/main/resources/org/eolang/lints/metas/duplicate-metas.xsl b/src/main/resources/org/eolang/lints/metas/duplicate-metas.xsl
index 09689f44..c3eea4da 100644
--- a/src/main/resources/org/eolang/lints/metas/duplicate-metas.xsl
+++ b/src/main/resources/org/eolang/lints/metas/duplicate-metas.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="duplicate-metas" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -38,9 +39,9 @@ SOFTWARE.
             <xsl:attribute name="severity">
               <xsl:text>warning</xsl:text>
             </xsl:attribute>
-            <xsl:text>The meta "</xsl:text>
-            <xsl:value-of select="concat(head, ' ', tail)"/>
-            <xsl:text>" is seen more than once</xsl:text>
+            <xsl:text>The meta </xsl:text>
+            <xsl:value-of select="eo:escape(concat(head, ' ', tail))"/>
+            <xsl:text> is seen more than once</xsl:text>
           </xsl:element>
         </xsl:if>
       </xsl:for-each>
diff --git a/src/main/resources/org/eolang/lints/metas/incorrect-architect.xsl b/src/main/resources/org/eolang/lints/metas/incorrect-architect.xsl
index b0c8dea0..8e79782a 100644
--- a/src/main/resources/org/eolang/lints/metas/incorrect-architect.xsl
+++ b/src/main/resources/org/eolang/lints/metas/incorrect-architect.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="incorrect-architect" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -38,9 +39,8 @@ SOFTWARE.
             <xsl:attribute name="severity">
               <xsl:text>warning</xsl:text>
             </xsl:attribute>
-            <xsl:text>The format of the email in the +architect meta is wrong: "</xsl:text>
-            <xsl:value-of select="$meta-tail"/>
-            <xsl:text>"</xsl:text>
+            <xsl:text>The format of the email in the +architect meta is wrong: </xsl:text>
+            <xsl:value-of select="eo:escape($meta-tail)"/>
           </xsl:element>
         </xsl:if>
       </xsl:for-each>
diff --git a/src/main/resources/org/eolang/lints/metas/incorrect-home.xsl b/src/main/resources/org/eolang/lints/metas/incorrect-home.xsl
index fa79181a..2b1c9e6e 100644
--- a/src/main/resources/org/eolang/lints/metas/incorrect-home.xsl
+++ b/src/main/resources/org/eolang/lints/metas/incorrect-home.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="incorrect-home" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -38,9 +39,8 @@ SOFTWARE.
             <xsl:attribute name="severity">
               <xsl:text>warning</xsl:text>
             </xsl:attribute>
-            <xsl:text>The format of the URL at the +home meta is wrong: "</xsl:text>
-            <xsl:value-of select="$meta-tail"/>
-            <xsl:text>"</xsl:text>
+            <xsl:text>The format of the URL at the +home meta is wrong: </xsl:text>
+            <xsl:value-of select="eo:escape($meta-tail)"/>
           </xsl:element>
         </xsl:if>
       </xsl:for-each>
diff --git a/src/main/resources/org/eolang/lints/metas/incorrect-jvm-rt-location.xsl b/src/main/resources/org/eolang/lints/metas/incorrect-jvm-rt-location.xsl
index e099505e..8aba24e5 100644
--- a/src/main/resources/org/eolang/lints/metas/incorrect-jvm-rt-location.xsl
+++ b/src/main/resources/org/eolang/lints/metas/incorrect-jvm-rt-location.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="incorrect-jvm-rt-location" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -39,9 +40,8 @@ SOFTWARE.
             <xsl:attribute name="severity">
               <xsl:text>warning</xsl:text>
             </xsl:attribute>
-            <xsl:text>The format of the location of jvm runtime is wrong: "</xsl:text>
-            <xsl:value-of select="$location"/>
-            <xsl:text>"</xsl:text>
+            <xsl:text>The format of the location of the "jvm" runtime is wrong: </xsl:text>
+            <xsl:value-of select="eo:escape($location)"/>
           </xsl:element>
         </xsl:if>
       </xsl:for-each>
diff --git a/src/main/resources/org/eolang/lints/metas/incorrect-node-rt-location.xsl b/src/main/resources/org/eolang/lints/metas/incorrect-node-rt-location.xsl
index dcac81da..e311714d 100644
--- a/src/main/resources/org/eolang/lints/metas/incorrect-node-rt-location.xsl
+++ b/src/main/resources/org/eolang/lints/metas/incorrect-node-rt-location.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="incorrect-node-rt-location" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -39,9 +40,8 @@ SOFTWARE.
             <xsl:attribute name="severity">
               <xsl:text>warning</xsl:text>
             </xsl:attribute>
-            <xsl:text>The format of the location of node runtime is wrong: "</xsl:text>
-            <xsl:value-of select="$location"/>
-            <xsl:text>"</xsl:text>
+            <xsl:text>The format of the location of node runtime is wrong: </xsl:text>
+            <xsl:value-of select="eo:escape($location)"/>
           </xsl:element>
         </xsl:if>
       </xsl:for-each>
diff --git a/src/main/resources/org/eolang/lints/metas/incorrect-package.xsl b/src/main/resources/org/eolang/lints/metas/incorrect-package.xsl
index ca5a1575..66df6611 100644
--- a/src/main/resources/org/eolang/lints/metas/incorrect-package.xsl
+++ b/src/main/resources/org/eolang/lints/metas/incorrect-package.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="incorrect-package" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -39,9 +40,8 @@ SOFTWARE.
             <xsl:attribute name="severity">
               <xsl:text>warning</xsl:text>
             </xsl:attribute>
-            <xsl:text>The format of the +package meta is wrong: "</xsl:text>
-            <xsl:value-of select="$first"/>
-            <xsl:text>"</xsl:text>
+            <xsl:text>The format of the +package meta is wrong: </xsl:text>
+            <xsl:value-of select="eo:escape($first)"/>
           </xsl:element>
         </xsl:if>
       </xsl:for-each>
diff --git a/src/main/resources/org/eolang/lints/metas/incorrect-version.xsl b/src/main/resources/org/eolang/lints/metas/incorrect-version.xsl
index 8f9af678..6ac4c427 100644
--- a/src/main/resources/org/eolang/lints/metas/incorrect-version.xsl
+++ b/src/main/resources/org/eolang/lints/metas/incorrect-version.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="incorrect-version" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -38,9 +39,9 @@ SOFTWARE.
             <xsl:attribute name="severity">
               <xsl:text>warning</xsl:text>
             </xsl:attribute>
-            <xsl:text>The format of the +version meta is wrong: "</xsl:text>
-            <xsl:value-of select="$meta-tail"/>
-            <xsl:text>" (SemVer expected instead)</xsl:text>
+            <xsl:text>The format of the +version meta is wrong: </xsl:text>
+            <xsl:value-of select="eo:escape($meta-tail)"/>
+            <xsl:text> (SemVer expected instead)</xsl:text>
           </xsl:element>
         </xsl:if>
       </xsl:for-each>
diff --git a/src/main/resources/org/eolang/lints/metas/unknown-metas.xsl b/src/main/resources/org/eolang/lints/metas/unknown-metas.xsl
index cca607ba..90c38692 100644
--- a/src/main/resources/org/eolang/lints/metas/unknown-metas.xsl
+++ b/src/main/resources/org/eolang/lints/metas/unknown-metas.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="unknown-metas" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -38,9 +39,9 @@ SOFTWARE.
             <xsl:attribute name="severity">
               <xsl:text>warning</xsl:text>
             </xsl:attribute>
-            <xsl:text>The meta "</xsl:text>
-            <xsl:value-of select="$meta-head"/>
-            <xsl:text>" is not supported and its usage has no effect</xsl:text>
+            <xsl:text>The meta </xsl:text>
+            <xsl:value-of select="eo:escape($meta-head)"/>
+            <xsl:text> is not supported, and its usage has no effect</xsl:text>
           </xsl:element>
         </xsl:if>
       </xsl:for-each>
diff --git a/src/main/resources/org/eolang/lints/metas/unsorted-metas.xsl b/src/main/resources/org/eolang/lints/metas/unsorted-metas.xsl
index 8bb9d617..601ce10f 100644
--- a/src/main/resources/org/eolang/lints/metas/unsorted-metas.xsl
+++ b/src/main/resources/org/eolang/lints/metas/unsorted-metas.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="unsorted-metas" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -39,9 +40,9 @@ SOFTWARE.
             <xsl:attribute name="severity">
               <xsl:text>warning</xsl:text>
             </xsl:attribute>
-            <xsl:text>The "</xsl:text>
-            <xsl:value-of select="$meta-text"/>
-            <xsl:text>" meta is out of order</xsl:text>
+            <xsl:text>The </xsl:text>
+            <xsl:value-of select="eo:escape($meta-text)"/>
+            <xsl:text> meta is out of order</xsl:text>
           </xsl:element>
         </xsl:if>
       </xsl:for-each>
diff --git a/src/main/resources/org/eolang/lints/metas/zero-version.xsl b/src/main/resources/org/eolang/lints/metas/zero-version.xsl
index 52620ba7..32899da5 100644
--- a/src/main/resources/org/eolang/lints/metas/zero-version.xsl
+++ b/src/main/resources/org/eolang/lints/metas/zero-version.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="zero-version" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -37,9 +38,8 @@ SOFTWARE.
             <xsl:attribute name="severity">
               <xsl:text>error</xsl:text>
             </xsl:attribute>
-            <xsl:text>This +version may be used only during development: "</xsl:text>
-            <xsl:value-of select="tail/text()"/>
-            <xsl:text>"</xsl:text>
+            <xsl:text>This +version may be used only during development: </xsl:text>
+            <xsl:value-of select="eo:escape(tail/text())"/>
           </xsl:element>
         </xsl:if>
       </xsl:for-each>
diff --git a/src/main/resources/org/eolang/lints/misc/incorrect-test-object-name.xsl b/src/main/resources/org/eolang/lints/misc/incorrect-test-object-name.xsl
index 69178627..eef3fc60 100644
--- a/src/main/resources/org/eolang/lints/misc/incorrect-test-object-name.xsl
+++ b/src/main/resources/org/eolang/lints/misc/incorrect-test-object-name.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" version="2.0" id="incorrect-test-object-name">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:output encoding="UTF-8" method="xml" indent="yes"/>
   <xsl:template match="/">
@@ -36,12 +37,10 @@ SOFTWARE.
               <xsl:value-of select="eo:lineno(@line)"/>
             </xsl:attribute>
             <xsl:attribute name="severity">warning</xsl:attribute>
-            <xsl:text>The name of the object "</xsl:text>
-            <xsl:value-of select="@name"/>
-            <xsl:text>"</xsl:text>
-            <xsl:text> doesn't match "</xsl:text>
-            <xsl:value-of select="$regexp"/>
-            <xsl:text>"</xsl:text>
+            <xsl:text>The name of the object </xsl:text>
+            <xsl:value-of select="eo:escape(@name)"/>
+            <xsl:text> doesn't match </xsl:text>
+            <xsl:value-of select="eo:escape($regexp)"/>
           </defect>
         </xsl:if>
       </xsl:for-each>
diff --git a/src/main/resources/org/eolang/lints/misc/one-high-level-object.xsl b/src/main/resources/org/eolang/lints/misc/one-high-level-object.xsl
index 468de86d..05937d0d 100644
--- a/src/main/resources/org/eolang/lints/misc/one-high-level-object.xsl
+++ b/src/main/resources/org/eolang/lints/misc/one-high-level-object.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" version="2.0" id="one-high-level-object">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:variable name="program" select="/program/@name"/>
   <xsl:variable name="tested" select="/program/metas/meta[head='tests']"/>
@@ -36,9 +37,9 @@ SOFTWARE.
             <xsl:value-of select="eo:lineno(@line)"/>
           </xsl:attribute>
           <xsl:attribute name="severity">warning</xsl:attribute>
-          <xsl:text>Program "</xsl:text>
-          <xsl:value-of select="$program"/>
-          <xsl:text>" has </xsl:text>
+          <xsl:text>Program </xsl:text>
+          <xsl:value-of select="eo:escape($program)"/>
+          <xsl:text> has </xsl:text>
           <xsl:value-of select="$objects"/>
           <xsl:text> objects, while only 1 is allowed</xsl:text>
         </defect>
diff --git a/src/main/resources/org/eolang/lints/names/object-does-not-match-filename.xsl b/src/main/resources/org/eolang/lints/names/object-does-not-match-filename.xsl
index ef6a189a..6bd4bdeb 100644
--- a/src/main/resources/org/eolang/lints/names/object-does-not-match-filename.xsl
+++ b/src/main/resources/org/eolang/lints/names/object-does-not-match-filename.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:eo="https://www.eolang.org" version="2.0" id="object-does-not-match-filename">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:variable name="package" select="/program/metas/meta[head='package']"/>
   <xsl:variable name="program" select="/program/@name"/>
@@ -50,11 +51,10 @@ SOFTWARE.
           <xsl:value-of select="eo:lineno(@line)"/>
         </xsl:attribute>
         <xsl:attribute name="severity">warning</xsl:attribute>
-        <xsl:text>Object "</xsl:text>
-        <xsl:value-of select="@name"/>
-        <xsl:text>" does not match with filename "</xsl:text>
-        <xsl:value-of select="$filename"/>
-        <xsl:text>"</xsl:text>
+        <xsl:text>Object </xsl:text>
+        <xsl:value-of select="eo:escape(@name)"/>
+        <xsl:text> does not match with filename </xsl:text>
+        <xsl:value-of select="eo:escape($filename)"/>
       </defect>
     </xsl:if>
   </xsl:template>
diff --git a/src/main/resources/org/eolang/lints/refs/broken-ref.xsl b/src/main/resources/org/eolang/lints/refs/broken-ref.xsl
index d45c84f5..01eb831b 100644
--- a/src/main/resources/org/eolang/lints/refs/broken-ref.xsl
+++ b/src/main/resources/org/eolang/lints/refs/broken-ref.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="broken-ref" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -37,11 +38,10 @@ SOFTWARE.
             <xsl:attribute name="line">
               <xsl:value-of select="eo:lineno(@line)"/>
             </xsl:attribute>
-            <xsl:text>The object "</xsl:text>
-            <xsl:value-of select="@base"/>
-            <xsl:text>" is absent, but is referenced as "</xsl:text>
-            <xsl:value-of select="@ref"/>
-            <xsl:text>"</xsl:text>
+            <xsl:text>The object </xsl:text>
+            <xsl:value-of select="eo:escape(@base)"/>
+            <xsl:text> is absent, but is referenced as </xsl:text>
+            <xsl:value-of select="eo:escape(@ref)"/>
           </xsl:element>
         </xsl:if>
       </xsl:for-each>
diff --git a/src/main/resources/org/eolang/lints/refs/line-is-absent.xsl b/src/main/resources/org/eolang/lints/refs/line-is-absent.xsl
index c7f580ff..fc6a31b4 100644
--- a/src/main/resources/org/eolang/lints/refs/line-is-absent.xsl
+++ b/src/main/resources/org/eolang/lints/refs/line-is-absent.xsl
@@ -37,7 +37,7 @@ SOFTWARE.
         <xsl:variable name="self" select="."/>
         <xsl:variable name="target" select="key('objsNoLineByName', $self/@base)"/>
         <xsl:if test="$target">
-          <defect line="eo:lineno(@line)" severity="error">
+          <defect line="0" severity="error">
             The @line attribute is absent at <xsl:value-of select="$target/@name"/>
           </defect>
         </xsl:if>
diff --git a/src/main/resources/org/eolang/lints/tests/unit-test-without-phi.xsl b/src/main/resources/org/eolang/lints/tests/unit-test-without-phi.xsl
index 20054e49..a69f1932 100644
--- a/src/main/resources/org/eolang/lints/tests/unit-test-without-phi.xsl
+++ b/src/main/resources/org/eolang/lints/tests/unit-test-without-phi.xsl
@@ -24,6 +24,7 @@ SOFTWARE.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="unit-test-without-phi" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
@@ -35,9 +36,8 @@ SOFTWARE.
           <xsl:attribute name="severity">
             <xsl:text>warning</xsl:text>
           </xsl:attribute>
-          <xsl:text>The unit test doesn't have "@" attribute: "</xsl:text>
-          <xsl:value-of select="@name"/>
-          <xsl:text>"</xsl:text>
+          <xsl:text>The unit test doesn't have "@" attribute: </xsl:text>
+          <xsl:value-of select="eo:escape(@name)"/>
         </xsl:element>
       </xsl:for-each>
     </defects>
diff --git a/src/test/java/org/eolang/lints/DefectMatcher.java b/src/test/java/org/eolang/lints/DefectMatcher.java
new file mode 100644
index 00000000..fe423fba
--- /dev/null
+++ b/src/test/java/org/eolang/lints/DefectMatcher.java
@@ -0,0 +1,68 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016-2024 Objectionary.com
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.eolang.lints;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.hamcrest.BaseMatcher;
+import org.hamcrest.Description;
+import org.hamcrest.Matcher;
+import org.hamcrest.Matchers;
+
+/**
+ * Hamcrest matcher for a single defect.
+ *
+ * @since 0.0.34
+ */
+final class DefectMatcher extends BaseMatcher<Defect> {
+
+    /**
+     * Synthetic matcher that is built when input arrives.
+     */
+    private final List<Matcher<?>> matchers = new ArrayList<>(0);
+
+    @Override
+    public boolean matches(final Object input) {
+        final Defect defect = (Defect) input;
+        return this.saved(Matchers.greaterThanOrEqualTo(0)).matches(defect.line())
+            && this.saved(Matchers.not(Matchers.emptyString())).matches(defect.text())
+            && this.saved(new GrammarMatcher()).matches(defect.text());
+    }
+
+    @Override
+    public void describeTo(final Description desc) {
+        for (int idx = 0; idx < this.matchers.size(); ++idx) {
+            if (idx > 0) {
+                desc.appendText(" and ");
+            }
+            final Matcher<?> matcher = this.matchers.get(idx);
+            matcher.describeTo(desc);
+        }
+    }
+
+    private Matcher<?> saved(final Matcher<?> matcher) {
+        this.matchers.add(matcher);
+        return matcher;
+    }
+}
diff --git a/src/test/java/org/eolang/lints/DefectsMatcher.java b/src/test/java/org/eolang/lints/DefectsMatcher.java
new file mode 100644
index 00000000..311a8187
--- /dev/null
+++ b/src/test/java/org/eolang/lints/DefectsMatcher.java
@@ -0,0 +1,68 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016-2024 Objectionary.com
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.eolang.lints;
+
+import com.jcabi.xml.XML;
+import java.util.Collection;
+import java.util.LinkedList;
+import org.hamcrest.BaseMatcher;
+import org.hamcrest.Description;
+import org.hamcrest.Matcher;
+import org.hamcrest.Matchers;
+
+/**
+ * Hamcrest matcher for defects in XML.
+ *
+ * @since 0.0.34
+ */
+final class DefectsMatcher extends BaseMatcher<XML> {
+
+    /**
+     * Synthetic matcher that is built when input arrives.
+     */
+    private Matcher<Iterable<? extends Defect>> matcher;
+
+    @Override
+    public boolean matches(final Object xml) {
+        final Collection<Defect> defects = new LinkedList<>();
+        for (final XML defect : ((XML) xml).nodes("/defects/defect")) {
+            defects.add(
+                new Defect.Default(
+                    "unknown",
+                    Severity.parsed(defect.xpath("@severity").get(0)),
+                    "unknown",
+                    Integer.parseInt(defect.xpath("@line").get(0)),
+                    defect.xpath("text()").get(0)
+                )
+            );
+        }
+        this.matcher = Matchers.everyItem(new DefectMatcher());
+        return this.matcher.matches(defects);
+    }
+
+    @Override
+    public void describeTo(final Description desc) {
+        this.matcher.describeTo(desc);
+    }
+}
diff --git a/src/test/java/org/eolang/lints/GrammarMatcher.java b/src/test/java/org/eolang/lints/GrammarMatcher.java
new file mode 100644
index 00000000..cedc2dad
--- /dev/null
+++ b/src/test/java/org/eolang/lints/GrammarMatcher.java
@@ -0,0 +1,122 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016-2024 Objectionary.com
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.eolang.lints;
+
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import org.hamcrest.BaseMatcher;
+import org.hamcrest.Description;
+import org.languagetool.JLanguageTool;
+import org.languagetool.Languages;
+import org.languagetool.markup.AnnotatedText;
+import org.languagetool.markup.AnnotatedTextBuilder;
+import org.languagetool.rules.Rule;
+import org.languagetool.rules.RuleMatch;
+import org.languagetool.rules.spelling.SpellingCheckRule;
+
+/**
+ * Hamcrest matcher for a single piece of text, to make sure it's
+ * grammatically valid.
+ *
+ * @since 0.0.34
+ */
+final class GrammarMatcher extends BaseMatcher<String> {
+
+    /**
+     * The item to be matched.
+     */
+    private String input;
+
+    /**
+     * Errors.
+     */
+    private List<RuleMatch> errors;
+
+    @Override
+    public boolean matches(final Object obj) {
+        final JLanguageTool tool = new JLanguageTool(
+            Languages.getLanguageForShortCode("en-GB")
+        );
+        for (final Rule rule : tool.getAllActiveRules()) {
+            if (rule instanceof SpellingCheckRule) {
+                ((SpellingCheckRule) rule).addIgnoreTokens(
+                    Arrays.asList("decoratee", "eolang")
+                );
+            }
+        }
+        this.input = obj.toString();
+        try {
+            this.errors = tool.check(GrammarMatcher.annotated(this.input));
+        } catch (final IOException ex) {
+            throw new IllegalArgumentException(ex);
+        }
+        return this.errors.isEmpty();
+    }
+
+    @Override
+    public void describeTo(final Description desc) {
+        for (int idx = 0; idx < this.errors.size(); ++idx) {
+            if (idx > 0) {
+                desc.appendText(" and ");
+            }
+            final RuleMatch match = this.errors.get(idx);
+            desc.appendText("\n")
+                .appendValue(match.getRule().getId())
+                .appendText(" (")
+                .appendText(match.getMessage())
+                .appendText(") at ")
+                .appendText(Integer.toString(match.getFromPos()))
+                .appendText("-")
+                .appendText(Integer.toString(match.getToPos()))
+                .appendText(" in:\n  ")
+                .appendText(this.input)
+                .appendText("\n  annotated input:\n  ")
+                .appendText(GrammarMatcher.annotated(this.input).toString())
+                .appendText("\n  suggested correction(s):\n  ")
+                .appendValue(match.getSuggestedReplacements());
+        }
+    }
+
+    private static AnnotatedText annotated(final String text) {
+        final AnnotatedTextBuilder builder = new AnnotatedTextBuilder();
+        final Pattern pattern = Pattern.compile("\"([^\"]+)\"");
+        final Matcher matcher = pattern.matcher(text);
+        int last = 0;
+        while (matcher.find()) {
+            final int start = matcher.start();
+            if (start > last) {
+                builder.addText(text.substring(last, start));
+            }
+            builder.addMarkup("\"").addText("text skipped").addMarkup("\"");
+            last = matcher.end();
+        }
+        if (last < text.length()) {
+            builder.addText(text.substring(last));
+        }
+        return builder.build();
+    }
+}
diff --git a/src/test/java/org/eolang/lints/LtByXslTest.java b/src/test/java/org/eolang/lints/LtByXslTest.java
index 84384b15..383445db 100644
--- a/src/test/java/org/eolang/lints/LtByXslTest.java
+++ b/src/test/java/org/eolang/lints/LtByXslTest.java
@@ -23,6 +23,7 @@
  */
 package org.eolang.lints;
 
+import com.jcabi.matchers.XhtmlMatchers;
 import com.jcabi.xml.XMLDocument;
 import java.io.IOException;
 import java.nio.file.Files;
@@ -31,6 +32,8 @@
 import java.util.Set;
 import java.util.stream.Collectors;
 import org.cactoos.io.InputOf;
+import org.cactoos.text.TextOf;
+import org.cactoos.text.UncheckedText;
 import org.eolang.jeo.Disassembler;
 import org.eolang.jucs.ClasspathSource;
 import org.eolang.parser.EoSyntax;
@@ -58,7 +61,7 @@ final class LtByXslTest {
     @Test
     void lintsOneFile() throws IOException {
         MatcherAssert.assertThat(
-            "the objects is found",
+            "No defects found, while a few of them expected",
             new LtByXsl("critical/duplicate-names").defects(
                 new EoSyntax(
                     new InputOf("# first\n[] > foo\n# first\n[] > foo\n")
@@ -72,14 +75,14 @@ void lintsOneFile() throws IOException {
     @ClasspathSource(value = "org/eolang/lints/packs/", glob = "**.yaml")
     void testsAllLintsByEo(final String yaml) {
         MatcherAssert.assertThat(
-            "must pass without errors",
+            "Doesn't tell the story as it's expected",
             new XtSticky(
                 new XtYaml(
                     yaml,
                     eo -> new EoSyntax("pack", new InputOf(eo)).parsed()
                 )
             ),
-            new XtoryMatcher()
+            new XtoryMatcher(new DefectsMatcher())
         );
     }
 
@@ -176,6 +179,27 @@ void checksFileNaming() throws IOException {
             );
     }
 
+    @Test
+    void checksIdsInXslStylesheets() throws IOException {
+        Files.walk(Paths.get("src/main/resources/org/eolang/lints"))
+            .filter(Files::isRegularFile)
+            .filter(file -> file.getFileName().toString().endsWith(".xsl"))
+            .forEach(
+                path -> MatcherAssert.assertThat(
+                    String.format("@id is wrong in: %s", path),
+                    XhtmlMatchers.xhtml(
+                        new UncheckedText(new TextOf(path)).asString()
+                    ),
+                    XhtmlMatchers.hasXPath(
+                        String.format(
+                            "/xsl:stylesheet[@id='%s']",
+                            path.getFileName().toString().replaceAll("\\.xsl$", "")
+                        )
+                    )
+                )
+            );
+    }
+
     @Test
     @Timeout(30L)
     void checksEmptyObjectOnLargeXmirInReasonableTime(@TempDir final Path tmp) throws IOException {