There sure is! most of the fixes you would be working with are SQL based bugs and issues, but your more than welcome to give it a shot! message @ExO with inquiry about it, and he will get back to you if there are spots available!
Update coming to client downloader, Supported Languages that will be added:
enUS (currently supported)
deDE
esMX
frFR
ptBR
ptPT
ruRU
will update post once its updated.
i found this issue aswell, theres an exp modifier in your worldserver config, aswell as in the database, ensure both are set to 1 and this issue will no longer arise :)
make sure your config files are set to using the database for items and not DBC, if its set to be using DBC which i beleive is default, your item changes wont matter