Gender game : remove son / sa from french highlight regex

In French, "son" and "sa" (translation of his / her) does not depend on the gender of the person, but of the related word. Ex: "His son and his daughter" is translated as "Son fils et sa fille", "Her son and her daughter" is also translate as "Son fils et sa fille" because "fils" is masculine, and "fille" is feminine.

So highlighting it is just confusing.