I (from the US) visited my cousins in Italy, and as we were driving around, my cousin and his best friend were joking back and forth in Italian, and it ended with him just kissing his friend on the cheek out of nowhere. It was very cute and entirely non sexual lol. Got a kick out of it since i don’t really see that at all in the US.
It may not be de jure open source, but if the code is posted publicly on the internet in a way that anyone can download and modify it, it sort of becomes de facto open source (or “source available” if you prefer).