In Luna we introduced in platform.ui an improved version of the translation service via the @Message annotation.
The annotation allows to define the resource bundle / class via an optional parameter which was unfortunately incorrectly named in Luna.
We fixed that for Mars and deprecated the old parameter. I think it would be good to downport this so that new customers can start using the correction version.
Please review the changes in the Bug and let me know if I can downport it. Risk is minimal IMHO as we still support the old parameter and the API is brand new.
Best regards, Lars