I have been contributing to the Wikipedia, mainly to various articles on mathematics, since July 2003. I was made an administrator in August 2005. My administrative actions are available for scrutiny here: block, protection, deletion. I am running Jitse's bot.
Languages. My first language is Dutch (or Limburgish, to be pedantic). My English is almost as good as a native speaker's (almost because of my accent). I learnt German, French and Latin in school, and can make sense of most Germanic and Romance languages.