Hi,
Thanks for your post,
Creating a French version of PB would be great see this post
http://piano-booster.2625608.n2.nabble.com/Translating-PianoBooster-td4664159.html#a4664159Regarding do, ré, mi please see my reply to this post.
http://piano-booster.2625608.n2.nabble.com/Showing-do-re-mi-note-names-td5109021.html#a5132548I am putting together a beginners piano course see this file
BoosterMusicBooks.zip complete with flash cards in the next release.
To be honest your son may respond more to gaming features (earning stars and high scores etc) that I am planning in the release after next.
Yes it open source, please let me know if you make any changes. Are you on windows or Linux?
L.