Category:User en-N: Native English speakers
Category:User en-3: Users with advanced and fluent level of english
Category:User en-2: Users with intermediate level of english
Category:User en-1: Users with basic level of english
Category:User en-0: Users without level of english

This page uses content from Wikimedia Commons. The original article was at Category:User en-0. The list of authors can be seen in the page history. As with Solar Cooking, the text of Wikipedia is available under the GNU Free Documentation License.