I´ve never been thinking, that I could find the blues band with songs in French language. But I´ve just found band like that. But informations about the band are very poor. They are from Metz. The band means three musicians:
1. James Carpi - the guitarist, singer and composer
2. de Mike - the bass player
3. Romain Dilloretto - the drummer
Their repertoire includes James Carpi´s own songs and blues standards played in bluesrock mode. The lyrics are completely in French language. The sound should be compared with Johny Winter, Joe Bonamassa or Eric Sardinas. They have created two albums - Aperçu.... in 2006 and Farniente in 2009.
Here is their homepage with videos an jubox. There is the chronology and informations in French language to:
https://www.jjgang1.blogspot.cz
Here are free download links:
https://www.jamendo.com/en/list/a38087/jjgang-farniente