This consists of two user-commands which allow you to declare notation and commands localized to a locale.
See the tactic doc entry below for more information.
The code is inspired by code from Gabriel Ebner from the hott3 repository.
Add a new command to a locale and execute it right now.
The new command is added as a declaration to the environment with name
This declaration has attribute
_localized and as value a name-string pair.