Quick Question: Is it Prossible to switch the language from a Disc that lets say is original german to japanese? Or do I have to buy (if it even exsits) a Japanese Disc?

While I don't know too much about regional discs, I do know for sure that you would have to buy a Japanese disc. Also, I'm sure there's one out there somewhere, just search on eBay or something similar.

there is no need for the jp version italian is faster in 100% and any%

there is no need for the jp version italian is faster in 100% and any%

italian is not faster in any...??