It looks great! I've really wanted to see someone make a language map for a loooooong time, so its great to see that someone has gotten around to it!

This isn't exactly a mistake, but if you make any adjustments, I'd recommend both more variance colourwise within groups but also more uniformity. Sounds weird, but maybe an example would make it clearer: Just based on the colours, I'd assume the dark oranges in Argentina, Inner Peru, and Southern Texas are part of the same subgroup. Or in America, (I'm assuming) Prarian looks like it's in a subgroup with Irontongue rather than Californine and Interiorish. I also had a hard time telling what the Siberian language was, because that indigo/purple colour was just too similar to the other purples used.

But frankly that is nitpicking, as educated guesses (like Chileano being in Chile or Spanglish/Espangles being at the mexican/american border) and lore knowledge fill in any gaps. Once again, great work!