[Abcdxxxx]

Well, it is their scriptures. Why would they approve of anyone elses version of THEIR scriptures? More to the point, they're reading the text in it's native language. They only concern themselves with the translations when it comes to public image, and answering critics.

Edit: The flipside of that are those who say that Muslims translating the Koran into English would be the biased ones, using less harsh language, and that this translation is the only independent outsider translation.