Languages and my Mac

Question: why do keyboard shortcuts change if I change the language of the system? It is not like i am connecting a swedish keyboard as well.

I use keyboard shortcuts a lot. Especially in browsers. The command+[ and command+] are very useful, as is the command+Backspace. But when I change my language to Svenska, this becomes command+[something the swedish keyboard has on the same place als [ or ], probably å or ä]. Annoying.

The solution: buy a swedish keyboard, I think. Until then, I'm sticking with Dutch.