Forum:Article comments written in foreign languages

This wiki I'm an admin of uses the new comments section instead of the old "Talk:" namespace for articles. We have general guidelines regarding article comments to maintain a clean wiki (removal of spam comments or external site advetisements). But occasionally, we get comments that are written in a foreign language, usually French, Spanish, or Portugese. Since the wiki is English and most of the community reads/writes English, we just remove those comments. I'm wondering if this is exactly "ethical" since wikis are supposed to have an unbiased and open-minded point of view. --Immunizations (talk) (contribs) (Habbo page) 01:30, March 2, 2012 (UTC)