Thanks to Botella al Mar blog for this. This has to be the only group I know that sing in Tzotzil, a Mayan language spoken in the southern Mexican state of Chiapas. Sak Tzevul, which translates as lightning, are from the town of Zincantán in southern Chiapas. Their sound is, at its simplest, a fusion of rock and marimba with traditional Mayan music. The band however represents a wider project to protect and promote the regional traditions, exposing a younger generation to their own heritage through music and giving a voice to a culture marginalised within Mexico. Here is the video for their song Batz i Son. There is a great biography of the band here (in Spanish). Really interesting stuff.