BetaWiki has an extension of the week. This week it is Site Matrix. Site Matrix is a special page showing what projects exist for what languages.
It is a real eye opener. In the past many wikis have been created in anticipation of a future need, a need that never materialised. These projects have been just idling for someone to come along and start a project. In 2007 many projects that did not have any life in them were locked and deleted. There is a long list of discussions on Meta to close even more projects. I would argue that projects like the bm.wiktionary are closed as well.
I find it odd that I argue for the closure of projects...