Spanish is the 2nd rank in the languages with the most native speakers, and fourth with the most speakers (English speaker is about 3 times larger than spanish speaker).
But I searched .com names with keyword "matrix" and "matriz" as suffix...
I also think .com is King, but ai+brand.com or brand+ai seems not to be very beautiful meaning .ai domains can be used as good portfolio namings on pre-existing brands if they are tech-related.