[Plugin: qTranslate] html W3 validation error

I like when my page validate, but qTranslate make error : Error Line 40, Column 54: Using the meta element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.

<meta http-equiv=”Content-Language” content=”fr-FR” />

please tell me how to fix that (or use WPML ?)

thanks in advance

http://ww.wp.xz.cn/extend/plugins/qtranslate/