Localization support
From cppreference.com
                    
                                        
                    < c
                    
                                                            
                    | Defined in header <locale.h>  | |
| gets and sets the current C locale (function) | |
| queries numeric and monetary formatting details of the current locale (function) | |
| formatting details, returned by localeconv (class) | |
| Locale categories | |
| locale categories for setlocale (macro constant) | |

