**Author:** `max`
**Description:**
Many aspects of TeX rendering depend on local traditions. The most essential are:
* National characters in formulae and indices cannot be entered.
* The [[:en:https://en.wikipedia.org/wiki/decimal_separator|decimal separator]] is a comma in many countries (ru, fr, de and others). TeX by default treats a comma as a list separator, adding a very large skip after in: compare `<math>3.14\,\!</math>` and `<math>3,14\,\!</math>`. Actually, de andwe can write `<math>3{,}14</math>` but it's a dirty hack.
others). TeX by default treats a comma as a list separator, adding a very
large skip after in: compare <math>3.14\,\!</math> and <math>3,14\,\!</math>.
Actually, we can write <math>3{,}14</math> but it's a dirty hack.
* Some functions have national variants of designation, for example, '''tg'''
**tg** instead of '''tan'''**tan**. To avoid clumsy `<code>\mathop</code>` construction, we
we need a method for entering such names.
A reasonable way for fighting with all these inconveniences is to allow national
versions having their own TeX macros in preamble. There exists "babel" in
LaTeX, why not in texvc?
--------------------------
**Version**: unspecified
**Severity**: normal