Every item's name is missing after downloading and replacing the old with the new version of the mod on fabric.

you have a , too much and it corrupts the lang file

Could you provide some logs, debug.log, latest.log and crash report

you dont need any logs, your lang file has a comma too much which in turn amkes the game skip the file. it's not a valid json

you had a comma after "itemGroup.netherdepthsupgrade.netherdepthsupgrade_food": "Nether Depths Upgrade Food". Remove it and its fixed

I removed it myself to get the names back