Akshually... According to Wikipédia FR, the French equivalent of Sight Reading is "Lecture à vue" [1].
Notes:
- I'm French;
- I learnt to play the piano as a teenager, and I'm trying to get back to it again as at 45+;
- I too discovered the "sight reading" term online, but that was long ago (as I recall, through a video of an adult piano player doing "live sight-reading" versions of songs he didn't know beforehand, such as the Mario theme [2];
... and YET neither have I ever heard of nor used "Lecture à vue" (that I remember of). I too would use "apprendre le solfège" (EN: learn solfège) when saying that I'm learning to read the notes on sheet music while playing at the same time.
Notes:
... and YET neither have I ever heard of nor used "Lecture à vue" (that I remember of). I too would use "apprendre le solfège" (EN: learn solfège) when saying that I'm learning to read the notes on sheet music while playing at the same time.[1]: https://fr.wikipedia.org/wiki/Lecture_%C3%A0_vue (change language for confirmation)
[2]: Possibly this one? https://www.youtube.com/watch?v=b9IkpUYlOx8