diff --git a/app/helpers/settings_helper.rb b/app/helpers/settings_helper.rb
index 14ca2333e..ae915abf6 100644
--- a/app/helpers/settings_helper.rb
+++ b/app/helpers/settings_helper.rb
@@ -8,6 +8,7 @@ module SettingsHelper
     bg: 'Български',
     ca: 'Català',
     co: 'Corsu',
+    cy: 'Cymraeg',
     da: 'Dansk',
     de: 'Deutsch',
     el: 'Ελληνικά',
diff --git a/config/application.rb b/config/application.rb
index ea4949bf2..af023b0db 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -42,6 +42,7 @@ module Mastodon
       :bg,
       :ca,
       :co,
+      :cy,
       :da,
       :de,
       :el,