The following subroutines are provided to obtain and process locale-specific data:
| localeconv | Retrieves locale-dependent conventions of a program locale. |
| nl_langinfo | Returns information on language or cultural area in a program locale. |
| rpmatch | Determines whether a response is affirmative or negative in the current locale. |
| setlocale | Changes or queries a program's current locale. |
For more NLS subroutines see List of National Language Support Subroutines.