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    'fawiki' => array(
        100 => 'درگاه',
        101 => 'بحث_درگاه',
    ),

Those are your extra namespaces, but I cannot find a "ویکی‌واژه", which namespace is it? 

Thanks

Sorry, I told Wiktionary not Wikipedia, "ویکی‌واژه" is project namespace, Thanks.

You've currently got

        'fawiki' => array(
                'وپ' => NS_PROJECT,
        ),

But you want an extra one too, right?

Wiktionary => http://fa.wiktionary.org

    'fawiktionary' => array(
        100 => "پیوست",
        101 => "بحث_پیوست",
    ),

Still, those don't match the text you entered in your first message...

see this : http://fa.wiktionary.org/w/api.php?action=query&meta=siteinfo&siprop=namespaces

<ns id="4" case="case-sensitive" subpages="" canonical="Project" xml:space="preserve">ویکی‌واژه</ns>

So it's not NS_PROJECT, it's "the project namespace" ie "wiktionary"

Should be like this :
        'fawiktionary' => array(
                'وو' => NS_PROJECT,
        ),

Done

Thank you very much