Has anyone had experience with japanese 1 or chinese 1 as breadth subjects? could I become fairly fluent just by doing four breadth subjects in one of these languages considering I have no previous experience with them? I am thinking of doing either japanese or spanish but can't decide..., I don't want to focus too much on learning languages such as going to extra language schools as I want to mainly focus on engineering, though another language in the pocket is always an advantage 
If you want to become fluent in languages, pick Spanish or German. You have no hope of doing four units of Jap or Chinese at uni and becoming semi fluent unless you dedicatedly study them. Learn something considered easy and similar to English.
Edit: Also, if you want the language to be worth anything, consider learning one with a lot of speakers. You won't meet many Dutch peeps around, so it's probably wasteful to learn their language. Depends on the individual and the situation, of course, but generally I think it's fair to claim this as holding true.