diff --git a/app/helpers/settings_helper.rb b/app/helpers/settings_helper.rb
index 14ca2333ef79a040ef54810c2c5b3abeadfdc34c..ae915abf686481fefc4d9d0b9d7e1541dcca837d 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 ea4949bf2d1e94c246a0bc65ae7873150d62fe72..af023b0db6b482f0e92d277828248bfebca5e75d 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -42,6 +42,7 @@ module Mastodon
       :bg,
       :ca,
       :co,
+      :cy,
       :da,
       :de,
       :el,