I think mainly because she doesn't know how to pronounce it.
oh pooh, who gives a care? read up a bit on it and just do it. if it's wrong, so what? just claim that it's an accent. you have those down there, I think.

But there's also the fact that our little church choir has only twice in the past forty years sung in other languages (Hospodi Pomilwi {sp?} and one short Kyrie), and thus the congregation also isn't used to it.
and that excuse is much worse than the other one. comfort the afflicted and afflict the comfortable.