diff --git a/Casks/firefox-developer-edition.rb b/Casks/firefox-developer-edition.rb
index 2ce668b2b4eb49..4630c46ecf50ca 100644
--- a/Casks/firefox-developer-edition.rb
+++ b/Casks/firefox-developer-edition.rb
@@ -2,6 +2,9 @@
   version :latest
   sha256 :no_check
 
+  language "ca" do
+    "ca"
+  end
   language "cs" do
     "cs"
   end