Alt tags - translation

Hi!

We have been having challenges with direct upload of translated XLIF format files in general. 

The last step I have to do for development of a new program in English is add ALT tags.  Before I start (and decide how detailed I want to be with ALT tags) I am wondering how seamless (or not) translation of embedded ALT tags into another language for Rise will be, as this program will be translated into several other languages. 

Anyone suggest I go cautious and mark most images as decorative to be safe, or can I feel secure that the ALT descriptions I include will format properly through XLIF download and translation processes?

Insights appreciated, thanks,

Angela