I'm not sure I got your point so could you plz open a new discussion in the Translation Team group: http://arastta.org/community/groups/item/5-translation-team

No, sorry - I meant for us.
There will be always changes at some files: adding, deleting and changing variables.
But these files haev to be imported at Crowdin for us - the translators - to be able to translate.

So, adding these files BEFORE a release is made AND building a new package at Crodwin will include those files with deleted / changed variables.
If these packages are used, Arastta will have troubles ...

But we - the translators - should have enough time for translating and adopting.

How will this process be handled in future?

As the language files are grabbed directly from Crowding and users can update translations within one-lick, before every release should be fine.