I'm not sure the pronunciation of the Name is all that important to God. He is the King of all Kings, and He hears and sees all. So different languages, accents and understandings are things that are surely not too big for Him to handle. He sees the heart and the intention. I don't think He would be offended by a sincere heart mispronouncing His Name, any more than a Father is of his baby child not quite getting his name right either.
I've often wondered how fathers would feel if their sons and daughters started calling them "The Name" rather than Father, or Dad or Fred or whatever.
Having said that, I personally use "Adonai" or "Lord" in English, because a title is a term of respect. I use "Father" as well, as our Master has taught.