diff --git a/data/io.elementary.installer.gresource.xml b/data/io.elementary.installer.gresource.xml
index 0942d91ae..e08676d4d 100644
--- a/data/io.elementary.installer.gresource.xml
+++ b/data/io.elementary.installer.gresource.xml
@@ -5,6 +5,8 @@
     <file alias="disk-bar-fallback.css" compressed="true">disk-bar-fallback.css</file>
     <file alias="ProgressView.css" compressed="true">ProgressView.css</file>
     <file compressed="true">wallpaper.jpg</file>
+  </gresource>
+  <gresource prefix="/io/elementary/installer/icons">
     <file alias="io.elementary.installer.caution.svg" compressed="true" preprocess="xml-stripblanks">caution.svg</file>
     <file alias="io.elementary.installer.emblem-downloads.svg" compressed="true" preprocess="xml-stripblanks">emblem-downloads.svg</file>
   </gresource>
diff --git a/src/Application.vala b/src/Application.vala
index 41daf293a..21062fe74 100644
--- a/src/Application.vala
+++ b/src/Application.vala
@@ -1,19 +1,6 @@
-// -*- Mode: vala; indent-tabs-mode: nil; tab-width: 4 -*-
-/*-
- * Copyright (c) 2016–2018 elementary LLC. (https://elementary.io)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+/*
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ * SPDX-FileCopyrightText: 2016-2024 elementary, Inc. (https://elementary.io)
  *
  * Authored by: Corentin Noël <corentin@elementary.io>
  */
@@ -26,10 +13,19 @@ public class Installer.App : Gtk.Application {
 
     public static bool test_mode;
 
+    public App () {
+        Object (
+            application_id: "io.elementary.installer",
+            flags: ApplicationFlags.FLAGS_NONE
+        );
+    }
+
     construct {
-        application_id = "io.elementary.installer";
-        flags = ApplicationFlags.FLAGS_NONE;
-        Intl.setlocale (LocaleCategory.ALL, "");
+        GLib.Intl.setlocale (LocaleCategory.ALL, "");
+        GLib.Intl.bindtextdomain (application_id, Build.LOCALEDIR);
+        GLib.Intl.bind_textdomain_codeset (application_id, "UTF-8");
+        GLib.Intl.textdomain (application_id);
+
         add_main_option_entries (INSTALLER_OPTIONS);
     }
 
@@ -44,6 +40,14 @@ public class Installer.App : Gtk.Application {
             css_provider,
             Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION
         );
+
+        var css_fallback = new Gtk.CssProvider ();
+        css_fallback.load_from_resource ("io/elementary/installer/disk-bar-fallback.css");
+        Gtk.StyleContext.add_provider_for_screen (
+            Gdk.Screen.get_default (),
+            css_fallback,
+            Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION
+        );
     }
 
     public override void activate () {
@@ -57,17 +61,6 @@ public class Installer.App : Gtk.Application {
         window.show_all ();
         add_window (window);
 
-        weak Gtk.IconTheme default_theme = Gtk.IconTheme.get_default ();
-        default_theme.add_resource_path ("/io/elementary/installer");
-
-        var css_fallback = new Gtk.CssProvider ();
-        css_fallback.load_from_resource ("io/elementary/installer/disk-bar-fallback.css");
-        Gtk.StyleContext.add_provider_for_screen (
-            Gdk.Screen.get_default (),
-            css_fallback,
-            Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION
-        );
-
         inhibit (
             get_active_window (),
             Gtk.ApplicationInhibitFlags.IDLE | Gtk.ApplicationInhibitFlags.SUSPEND,
@@ -77,6 +70,5 @@ public class Installer.App : Gtk.Application {
 }
 
 public static int main (string[] args) {
-    var application = new Installer.App ();
-    return application.run (args);
+    return new Installer.App ().run (args);
 }
diff --git a/src/Config.vala.in b/src/Config.vala.in
index 550688d72..a9f6c8bd6 100644
--- a/src/Config.vala.in
+++ b/src/Config.vala.in
@@ -1,6 +1,7 @@
 namespace Build {
     public const string GETTEXT_PACKAGE = "@GETTEXT_PACKAGE@";
     public const string LANG_LIST = "@LANG_LIST@";
+    public const string LOCALEDIR = @LOCALEDIR@;
     public const string PREFERRED_LANG_LIST = "@PREFERRED_LANG_LIST@";
     public const string XKB_BASE = "@XKB_BASE@";
     public const string ISO_CODES_LOCATION = "@ISO_CODES_LOCATION@";
diff --git a/src/meson.build b/src/meson.build
index e03557d41..432f98b23 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -34,6 +34,7 @@ vala_files = [
 configuration_data = configuration_data()
 configuration_data.set('GETTEXT_PACKAGE', meson.project_name())
 configuration_data.set('LANG_LIST', get_option('supported_languages'))
+configuration_data.set_quoted('LOCALEDIR', get_option('prefix') / get_option('localedir'))
 
 xkbconf = dependency('xkeyboard-config')
 xkb_base = xkbconf.get_pkgconfig_variable('xkb_base')