English: COOPERATION

Czech: SPOLUPRÁCE (spo-lup-rah-tse)

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

Croatian: SURADNJA (soo-rad-nia)

Estonian: KOOSTÖÖ

French: Coopération (Cooperación)

Greek: ΣΥΝΕΡΓΑΣΙΑ (SEEN-ER-YA-SEE-A)

Italian:

Romanian: cooperare [ cooperare ] 

Polish: WSPÓŁPRACA  ( f s p u w ' p r a t s a )

Portuguese: COOPERAÇÃO (co-o-pe-ra-ção)

Slovak:

Spanish: COOPERACIÓN (co-o-pe-ra-ción)