I just made this translation for my language:
es_ve.json

I also wanted to suggest that, just like in Smart Moving (one of my most favorite mods), the mechanics of flying with the mod on should be added, a realistic flight in creative, and for almost the same reason, the realistic flight with the Elytra, I think it goes very well with this mod.

(Sorry for posting this here, but I couldn't find anywhere else to put the suggestion.)

Also, I don't know if they fixed the bug with crawl in 1.16.5, the player would start to convulse, and sometimes if you spammed the button you would end up lying on the floor.

I don't know how to change the Labels

Good, could you send pull-request for your translation file? to main branch

Good, could you send pull-request for your translation file? to main branch

I didn't understand the question. Sorry Dx