Earlier quoted context omitted.
I am still surprised that the two-character icons which Zoom uses for accounts without profile pictures become "A�" for anyone called "Alice Ørland" or similar. It is even more surprising that Ö, Š, etc. become �, but 文军 shows up fine.
Specifically for that example, Zoom is written and maintained in China, so I would expect the developers made special code for segmenting chinese names but not non-English latin ones.
Standard "Latin" characters to me are those that are supported on a Latin keyboard, and provided for by the latin codepage.