Let's not forget that dubbing would cost at least 4x the amount it would most other games because the voice over scenes would have to be recorded in Japanese, English, French and German.

So now for one scene alone you need to contract 4 different actors, with 4 different studios, in 4 different parts the world.

And since everyone can change their audio preference freely no matter what region they play in, those actors/studios need contracts stipulating their work is being used internationally. If those contracts are anything like recording contracts for music labels (ever wonder why we don't see a lot of Japanese artists/soundtracks in American music stores?) then negotiating international rights takes even more time and money.