Are these guys actually sweedish?

They are. Who you suspect of not being swedish ?

No one it’s just on interviews some of them don’t sound sweedish

Swedes generally start learning English at the age of three in kindergarten and at University level up towards 50% (if not all) studies are in English. Most Swedes tend to try and adopt more of an American over a British accent. If that person has a musical ear / a good sence of pronunciation, it might fly under the radar I guess! =)