diff --git a/.gitattributes b/.gitattributes
index 3478ff7..5a6b16b 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1 +1,2 @@
 package-lock.json -diff linguist-generated=true
+*.mo linguist-language=MetaModelica
diff --git a/.github/workflows/build-parser.yml b/.github/workflows/build-parser.yml
index 5cd9991..39f5746 100644
--- a/.github/workflows/build-parser.yml
+++ b/.github/workflows/build-parser.yml
@@ -3,8 +3,6 @@ run-name: Build tree-sitter-metamodelica
 
 on:
   pull_request:
-    branches:
-      - main
   push:
     branches:
       - main
diff --git a/rules/builtin.js b/rules/builtin.js
index dc471fb..3c73b47 100644
--- a/rules/builtin.js
+++ b/rules/builtin.js
@@ -33,7 +33,7 @@
  *
  */
 
-// Buildin types and functions
+// Builtin types and functions
 //
 // From Towards Modelica 4 Meta-Programming and Language Modeling with MetaModelica 2.0
 // Section 5.1.2 Predefined Types and Type Constructors