You obviously never heard of the legend that is Lennart "Nacka" Skoglund!
But in modern times you are quite right. I'd say it's more about where he was brought up in Sweden though. Much like Zlatan he comes from one of the most infamous suburbs in Sweden, Zlatan from Rosengård in Malmö and Dejan from Spånga in Stockholm. There is another kind of street football being played in these places, which I guess predisposes the types of players that come out of it.
What's slightly funny about Dejan though is that he is actually raised in a "nice" area of Spånga while his accent in Swedish is telling that he probably went to school or mostly had friends in the not so nice parts.
His accent is what you can imagine the most ridiculous "Fam, bruv, fam"-London accent to sound like, but in Swedish.
Thinking about it, perhaps it's best you don't imagine it!