Grindviolence from Žďár nad Sázavou and Poděbrady, Czech Republic with Male/Female co-vocals. Here's a few of their splits I picked up at this year's Chimpyfest that I couldn't find anywhere else online.
Malignant Tumour split 7" 2004
Malignant Tumour are a Grindcore band from Ostrava, Czech Republic. Lyrics on Lycanthrophy side are in Czech and English, also worth mentioning they do a Limp Wrist cover.
Gride split 7" 2006
Gride are a Grindcore band from Prachatice and České Budějovice, Czech Republic. Both band sing in Czech on this release.
Sick/Tired split 7" 2014
Sick/Tired are a Grindviolence band from Chicago. After a few year Lycanthrophy abandoned writing songs in their own language and started exclusively singing in English.