No one 'discovered' the French language. As with all others it evolved.
French is derived (based off of) from Latin; it is a Romance Language.
La Reunion is a French overseas department, so French is the official language. This is because La Reunion has been a French territory since the 17th century and was colonized by the French. French language and culture have been influential in shaping the identity of the island.
French was not "discovered" since no language (aside from made-up ones like Klingon and Esperanto) comes into existence instantly. What we call French today has its roots in the dialects of Latin spoken in North Central France near what is today Paris in the 1300s and 1400s. Intermediate dialects of Latin that slowly become French existed for nearly 1000 years prior to this.
I don't believe it was ever truly discovered. It has its roots in the latin brought by the Romans when they invaded in 59 AD. The germanic tribes that invaded after the fall of the empire brought their own languages that influenced the language already present.
The Rosetta Stone, discovered in 1799 near Alexandria, was the key to hieroglyphics.
Where were French Fries discovered?
Anglais is English in the French language.
the french
French is the official language of France.
how to improve french language.
French is a Romance Language.
French is the only official language in France. Many other dialects and languages are spoken in France but none have official status or recognition.