Hi all,
Thank you very much for your advice. I really have issues with multiple fonts on Kobo reader, due to firmware limitations I guess.
@HarryT: I think I tried lucida Sans. I can't remember on which subset of unicode ranges I got problem with, but it couldn't match the three: chinese, pinyin (accented, I have noticed that some chinese pinyin used a different range for their accents) and french accents and cedillas
@Doitsu : of course there is Charis SIL ! I had completely forgot about it. I will drop it into my Kobo to check the result...
I guess sending code2000 into the kobo would be a copyright violation
François