Although I work for a foreign based company there are chances whilst my communication with clients or colleagues I may not pronounce certain words accurately. I would say it in the same way as I heard it for the first time from my school teacher or the seniors with whom I have worked. Correcting myself is only possible if someone brings to my notice the mistakes of mine.
Guys don’t worry and consider this as a serious limitation. Check out former President Abdul Kalam’s speech in EU Parliament on you tube. You hear him speaking in English and you will know pronunciation doesn’t matter. Words you use is important.