Nombres

Convert integers into french.

Provided as a 1-function library and a basic command-line utility (nbr — will certainly be renamed to something longer and less likely to name clash).

More advanced functionnalities could be added when needed. Here are some references:

• https://leconjugueur.lefigaro.fr/frlesnombres.php
• https://www.miakinen.net/vrac/nombres
• https://www.dcode.fr/ecriture-nombre-lettres