I understand your problems, but as long as it concerns multi-line text, you always have the option to give less information in your description. I also strugled to make the english text fit in the designed space, if you have to do some sacrifices for your language, you're allowed to do so
. The only other option would be to create different windows for each language and.... no
.
As for single line labels, I don't think there are too many labels of this kind that are too short. Again, you're allowed to remove some information to make the text fit. I promise you that I always have translation issues in mind when I design my windows, there's just a limit to what can be done.
Thank you for your understanding,
Patchou