diff --git a/.gitignore b/.gitignore
index 77585ec..11da693 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,7 @@
 *.blend1
 *.blend2
 *.blend3
+/locale
 /schemas/gschemas.compiled
 /resources/burn-my-windows.gresource
 /resources/burn-my-windows.gresource.xml
\ No newline at end of file
diff --git a/po/burn-my-windows.pot b/po/burn-my-windows.pot
index 998acde..a9c5f3b 100644
--- a/po/burn-my-windows.pot
+++ b/po/burn-my-windows.pot
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: Burn-My-Windows\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2022-01-28 14:59+0100\n"
+"POT-Creation-Date: 2022-01-28 20:08+0100\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -17,7 +17,13 @@ msgstr ""
 "Content-Type: text/plain; charset=CHARSET\n"
 "Content-Transfer-Encoding: 8bit\n"
 
-#: prefs.js:355
+#. Translators: %s will be replaced by the effect's name.
+#: prefs.js:336
+#, javascript-format
+msgid "Preview for %s"
+msgstr ""
+
+#: prefs.js:356
 msgid "Close this Window to Preview the Effect!"
 msgstr ""
 
diff --git a/prefs.js b/prefs.js
index 2d5d93a..26e2a23 100644
--- a/prefs.js
+++ b/prefs.js
@@ -332,7 +332,8 @@ var PreferencesDialog = class PreferencesDialog {
 
             // Create the preview-window.
             const window = new Gtk.Window({
-              title: `Preview for ${Effect.getLabel()}`,
+              // Translators: %s will be replaced by the effect's name.
+              title: _('Preview for %s').replace("%s", Effect.getLabel()),
               default_width: 800,
               default_height: 450,
               modal: true,
diff --git a/resources/ui/gtk3/prefs.ui b/resources/ui/gtk3/prefs.ui
index 708d1f5..b52ebf4 100644
--- a/resources/ui/gtk3/prefs.ui
+++ b/resources/ui/gtk3/prefs.ui
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<interface>
+<interface domain="burn-my-windows">
   <requires lib="gtk" version="3.0" />
 
   <menu id="close-effect-menu"></menu>
diff --git a/resources/ui/gtk4/prefs.ui b/resources/ui/gtk4/prefs.ui
index a4182b1..02ea86b 100644
--- a/resources/ui/gtk4/prefs.ui
+++ b/resources/ui/gtk4/prefs.ui
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<interface>
+<interface domain="burn-my-windows">
   <requires lib="gtk" version="4.0" />
 
   <menu id="close-effect-menu"></menu>