diff --git a/manifest.json b/manifest.json
index 23bb3e8..a46398c 100644
--- a/manifest.json
+++ b/manifest.json
@@ -95,5 +95,6 @@
     "default_icon": "icons/Lingualibre_SignIt-logo-no-text-square-32.png",
     "default_title": "Lingua Libre SignIt",
     "default_popup": "popup/popup.html"
-  }
+  },
+"default_locale": "fr"
 }
\ No newline at end of file