1. It's a relatively small dialect that's sort of a mix between the major languages of two South Indian states, owing to medieval migration. It's never on any forms and I would never expect it to be, but it also does not have a distinct name. And even more confusingly, despite it being named the same as one of the aforementioned major languages, I can't speak that one at all, and instead can speak the other.
2. After living abroad as a child and going to schools where English was the primary medium of instruction my entire life (even after moving back to India), I am by far the most fluent in English of the 4 languages I can speak (not all of them fluently). I think in English.
I often find myself sad about the attrition of my mother tongue, especially because I'm noticing it happen more and more not just to me but to my entire generation. I've often considered trying to document it in some way, but I've no idea where to even start such an effort.