@JoonasIlmavirta Good idea! Can you suggest a better name than "conversational"? I went with it simply because I couldn't think of a better idea right then. Colloquiale seems good, though not accessible to beginners, but it should be a synonym.
@BenKovitz If good synonyms come to mind, you can add them to a question (same question or separate questions, it doesn't matter). I can have them synonymized.
There is a way for the community to synonymize tags, but it's hard to find and doesn't work on the smaller sites. The best course of action is to tell the mods (in chat or elsewhere), or, in the case of any doubts, bring it up on meta.