Hacks\insights, how do you work on multilingual prototypes?

Hello everyone, Lately I feel like making multilingual prototypes is more complicated than it should be and I’m sure I’m not the only one encountering difficulties with it.
if you know a thing or two about multilingual prototypes please share your best practices, hacks/insights about it. It’s a kind of rare experience so every contribution is valuable.
BTW even if you don’t have solutions but know the struggle with multilingual prototypes you can help by sharing your experience and telling bout the difficulties you encounter. maybe together we chpuld find a better solutions.