Most of the faithful oppose translating the Koran.
That seems a very questionable assertion indeed. There are numerous translations from Islamic sources, including translations into English published in Saudi Arabia. There are also translations online.

Well seen, McGrath. But the faithful make a fine difference. The Koran was reveiled for them in clear Arabic language; the translations are not the Holy Koran, but their title is "the meaning of the Holy Koran" and similar expressions, when translated by a Muslim. When a translation has only Koran in the title you can be sure that it was written by an infidel scholar such as Bell, Paret et al.