English: GROUP

Czech: SKUPINA (sku-pi-na)

Belgian (Flemish, French, German???):

Croatian: GRUPA (groo-pah); SKUPINA (skoo-pee-nah)

Estonian: GRUPP

French: groupe (group)

Greek: ΟΜΑΔΑ (OMA-THA)

Italian:

Romanian: grup [ grup] 

Polish: GRUPA  ( g r u p a )

Portuguese: GRUPO (gru-po)

Slovak: SKUPINA / skupina/

Spanish: GRUPO (gru-po)