I am Dutch and mainly active in contributing to the Dutch Wikipedia.
1. My command of the English language, even if it is rather good, is not to be compared with that of my mother tongue.
2. Also the Dutch Wikipedia, even if it is growing at an amazing speed, is still a long way from being as good as the English one; so a lot more of work needs to be done there.
Occasionnally, however, I make some contributions to the English Wikipedia.
Link to my user page at the Dutch Wikipedia: [].