Laurent-
It looks like this is an impasse only for you Erik. From http://en.wikipedia.org/wiki/Wikipedia:Multilingual_coordination#Starting_a_ new_language_wikipedia
These guidelines were written in 2001, when many widely spoken natural languages did not have wikis yet. To apply them to a case like Klingon and the many other obscure conlangs that people want to push is absurd. On the matter of which languages should or should not be allowed, there is presently no community consensus. See the previous thread "Languages: crossing a border" on wikipedia-l which should lay to rest any claims that I am the only one concerned about opening the floodgates to allow any conlang that has "some number of interested speakers":
http://mail.wikipedia.org/pipermail/wikipedia-l/2004-April/014978.html
To be sure, many people agree with your position. That doesn't mean that is the only one. Various guidelines for inclusion have been proposed, none have been adopted yet. We can treat languages on a case by case basis or we can vote on a set of binding guidelines. Both approaches are workable. Attacking anyone who disagrees with you is not.
Regards,
Erik