[Risolto] Belgium should be a copy of Dutch

Hey guys, I have a website digustifood.nl, they have dutch (standard language), german, french & belgium (same language as dutch) as languages. They want to use automatic translation, but belgium should be a copy of dutch. What settings do I need to make so everything gets translated automatically besides belgium language (this should be direct copy of dutch language)? Also it should be that when they delete a product, the other versions get deleted too.