I am not aware of any country using the underscore to separate multiple of thousands, I just thought of it because it can be used for that purpose in some progr

I am not aware of any country using the underscore to separate multiple of thousands, I just thought of it because it can be used for that purpose in some programming languages. Ans if it's true that no country is using it, then I guess it could be used as a 'neutral' way of doing it.