Brain: We should have a character that knows a foreign language.
Me: Why?
Brain: So when a side character speaks in that foreign language the main character can respond to it!
Me: But...we don't know a foreign language.
Brain: That's what google translate is for! Come on! Foreign Language!
Me: But...the readers...
Brain: Never mind that. FOREIGN LANGUAGE!!! Let's imagine the scenario okay? You'll see. It will be amazing! FOREIGN LANGUAGE CONVERSATION!!!!