Nitpicking:
The CGA 8x8 font had a number of "foreign" (non-ascii) characters that could be displayed in 640x200 or 320x200 text modes. All (?) European though.
https://raw.githubusercontent.com/viler-int10h/CGA-font-comp...
From IBM's technical manual:
* 16 special characters for game support
* 15 characters for word-processing editing support
* 96 characters for the standard ASCII graphics set
* 48 characters for foreign-language support
* 48 characters for business block-graphics support (for the drawing of charts, boxes, and tables using single and double lines)
* 16 selected Greek characters
* 15 selected scientific-notation characters
...although https://en.wikipedia.org/wiki/Code_page_437#Internationaliza... reaches the conclusion that it only e.g. English, Germany and Swedish are fully supported due the lack of upper-case accented latin characters. Huh, TIL.