diff --git a/Library/Homebrew/cask/cask.rb b/Library/Homebrew/cask/cask.rb
index 2e00a20a70..fa99aa836f 100644
--- a/Library/Homebrew/cask/cask.rb
+++ b/Library/Homebrew/cask/cask.rb
@@ -246,6 +246,7 @@ module Cask
         "conflicts_with" => conflicts_with,
         "container"      => container&.pairs,
         "auto_updates"   => auto_updates,
+        "languages"      => languages,
       }
     end