This is a video of Dutch polyglot Wouter Corduwener (who knows 21 languages) running into another polyglot who allegedly knows 35, and the conversation that ensued. It's not the most in-depth conversation, but it's clear they each know at least the basics of all the languages they're speaking. Me? I only know two languages: the language of love and-- "Did you just blow a kiss at me?" What? No, I was pretending to be a fish. I also know fish talk, that's why Aquaman and I get along so well. Plus we're both super hunks.
Keep going for the video.
Thanks to Adrien, who can speak all the languages AND dialects.