User blog comment:Akvii/Natlang vs. Conlang Discussion/@comment-1355223-20100419221406

What Koppadasao is saying is relatively true, I can read pretty decent french though i have no hope at understanding it or speaking it. I can understand dutch pretty great though but thats only because i speak German and English fluently and Dutch is pretty close to both, "Childrens German" is what we call it over in Germany ^^.

And he is right about Norwegian, Danish, and Swedish being pretty much mutually intelligble, I had a few mates who were from Denmark and Sweden and Norway and they could all understand each other. :D

Besides you don't have to know more than one language to be able to create a great conlang. It just helps a lot ^^.