Can we change decimals 100,000 to 1,00,000 to invoice total and everywhere?

can we change decimals in 100,000 to 1,00,000 to invoice total and everywhere in settings?
i guess there is nothing like that in settings as of now, then i recommend to add this feature because it is required by many countries.
some country uses unit-tens-hundred-thousands-tenthousands-hundredthousands-million.
but some uses unit-tens-hundred-thousands-tenthousands-lakh-tenlakh-crore.
hence the comma separation varies, like 1,000,000,000 and 1,00,00,00,000.
i hope developers understand the concept of decimals
and i know it can be done in the coding but have read it wil revoke the support for the application. so please help with this.