[Catalyst] Translations for error message

[Kiki]

Stéphane Payrard wrote:
> Sebastian Riedel a écrit :
> | You may know the built in error screen you get when not in debug mode.
> | It says "Please come back later" in multiple languages, but so far we  
> | have not that many translations.
> | 
> | Please add translations for other languages to the list.
> | 
> |      (en) Please come back later
> |      (de) Bitte versuchen sie es später noch einmal
>        (fr) Revenez plus tard, s'il vous plait.
>   
(ro) Va rugăm să reveniţi mai târziu.