Sometimes you just have to bite the bullet. For interesting subjects, which always have global reach, the virtual conversations are conducted in English. There is also a place for vernacular -- it is part of people's cultural identity -- but not in a formal knowledge setting. English is a bit like Latin used to be: the language of knowledge, technology, and business. If the subject has global reach, you will miss out on the interesting bits of knowledge, simply because you are trying to do it in vernacular. Doing anything in vernacular, will just lock you up in a small and uninteresting national silo. Nothing of any interest is national. But yes, I use vernacular. I also speak it with my kids, but I don't read it -- unless it is poetry or literature -- and I don't use it in software or in business.