For the sake of accuracy about "Triste es lo cèl" that I posted above: this song is usually said to be a traditional song from Bearn (West Occitania, Gascon dialect, Bearnese subdialect) and you'll find the lyrics in Bearnese here.
It's actually much more recent that could be thought: there you can read (in Fr.) that the song was mentioned as written and composed by Simin Palai (1874-1965) thus under copyright till 2035 -author's life + 70y- and here if you click on the 2nd image below the book you'll get to the very song and the sheet music does read "Paroles et musique de Simin Palai". The Basque song in which the tune originated is Aiñhara/Ainhara -public domain.