x1 is someone with a plurality of cultural identities which matter to them/for relevant purposes, including x2, x3, ...
Countably infinitely many sumti slots (open-ended terbri structure), in no particular order. This word is used for e.g. "Hyphenated Canadian", referring to a Canadian with at least one additional identity (for example: Aboriginal, African-descent, Eastern European, British, American, Hispanic, Jewish, etc./vel sim.), etc.; not all identities need to have the same valence (for example: some may be nationalities, some may be ethnicities, some may be religions, some may be sexual orientations or identities, some may be races, etc.).