The most general name for this delimiter is digit group separator, because in various countries (eg, China, India, and Japan), there have been traditional conventions of grouping by 2 or 4 digits.
The most general name for this delimiter is digit group separator. There have been traditional conventions of grouping by 2 or 4 digits. This was in various countries (eg). This was in various countries (China). This was in various countries (India). This was in various countries (Japan).