I've found a bug.
When i tried to use the mod all of the items were in some kind of language while i was playing in english i dont know what it is or what i need to do ;/

Not a bug. The names of items and blocks are locked from the beginning, and become readable over time as you progress in the mod.
You can use the command /acunlockallknowledge to bypass this mechanic altogether, or enable "Display Item Names" in the config to display the names.