In Welsh, there isn’t a single pair of words that corresponds to ‘yes’ and ‘no’. Your answer depends on who you're referring to, which tense the question is in and how emphatic you want to be. This might sound bonkers, but not having a single pair of words meaning ‘yes’ and ‘no’ isn’t all that rare. Chinese, Japanese and Irish also have multiple versions of ‘yes’ and ‘no’. The system is a call-and-response one, meaning that how you answer ‘yes’ and ‘no’ depends on the type of question you’re asked. Usually, it’s a case of matching the type of response to the type of question. Initially, it seems like a minefield and something confabulated to vex learners.