thank you the problem was solved thanks to Norias who gave me the information
En le mettant dans /ow_plugins/tinymcepro/static/js/tinymce/langs/
puis en vidant le cache, l'erreur devrait disparaitre.
sorry to have bothered you
so please, change topic title to solved, because this discourage others to buy plugin
if i dont sell more licenses, then i dont be release new updates