Sorry for the inconvenience, I didn't notice that Views 3 implements locale handler providing a language filter.
This module it's not necessary. Not contribute anything new to views.
This module provides a views display extender that allows you to filter views results by current site language. Useful if you have multiple languages in your site and you want to show only those contents in the same language as the current language of the site.
Due to necessity I coded up this small custom module. Hopefully this can be helpful to someone else needing the same solution. This was a solution to my problem of migrating away from using wikitext filters on my 'wiki' content type. This ran each of the nodes through the PEARWiki filter and then saved the html back to the $node->body while updating the format so that it displays as html.