How set language ckeditor by html attribute?

Question

I can language set into javascript code

<script type="text/javascript">
   CKEDITOR.config.language = "fr";
</script>

I had a idea set lang do it like this?

<textarea name="name" id="name" cols="30" rows="10" data-lang="fr"></textarea>

Answer 1

The following one should help you (+ fiddle):

CKEDITOR.on( 'instanceCreated', function( evt ) {    
    var editor = evt.editor,
        element = editor.element,
        lang = element.data( 'lang' );

    if ( lang )
        evt.editor.config.language = lang;
});

Answer 2

Try this:

$('textarea').ckeditor({language: 'fr'});