It seems to me a fairly high proportion of questions on ELU that are concerned with determiners (a, the, some, any, my, its, this, that, etc.) are from non-native speakers asking things like "Which one do I use?", or "What does that refer to?".
There's no such tag yet on ELL. Apparently I already have enough rep to just go ahead and create one, but I'd like to know whether it would be considered useful, given most examples probably have more specific tags anyway (definite/indefinite article, possessive pronoun, etc).