diff --git a/frontend/src/views/Home.vue b/frontend/src/views/Home.vue
index 9488e59..cf19775 100644
--- a/frontend/src/views/Home.vue
+++ b/frontend/src/views/Home.vue
@@ -341,6 +341,7 @@ export default {
         roomKeyType: this.form.roomKeyType
       }
       let backFields = {
+        lang: this.$i18n.locale,
         emoticons: JSON.stringify(this.form.emoticons)
       }
       let ignoredNames = new Set(['roomId', 'authCode'])