How to filter the special characters, not including the French letters, using regular expressions

Question

I use replace(/[^\w\s]|_/g, "").replace(/\s+/g, " ") can filter all special character, but I don't want filter the French letters.

Answer 1

You can use this:

/[^\w\sàâäôéèëêïîçùûüÿæœÀÂÄÔÉÈËÊÏΟÇÙÛÜÆŒ]/g

You don't need special treatment for the _ as it is included in \w

Reference

French orthography