Opening Pull Request in order to purpose the Catalan Translation of the Yii Framework.
Added Catalan Translation.
Thanks for translation. Would be great if you'll watch it since messages are changing a bit in subsequential releases.
@ArnauAregall also, you can add yourself to the translation team for catalan language - https://github.com/yiisoft/yii/wiki/Translation-team
Thank you very much. It was a pleasure translating it.
I am already watching the repo, I just added me as @mdomba said to the catalan language translation team.