Hi,

I've checked the files, they are correct.
This is all what's in the lanuage.xml (file found in directory: /Providers/HtmlEditorProviders/Ftb3HtmlEditorProvider/ftb3/Languages);
<root>
 <language name="English (United States)" key="en-US" />
 <language name="Catalan (Catalan)" key="ca-ES" />
 <language name="Chinese (People's Republic of China)" key="zh-CN" />
 <language name="Chinese (Taiwan)" key="zh-TW" />
 <language name="Czech (Czech Republic)" key="cs-CZ" />
 <language name="Dutch (Netherlands)" key="nl-NL" />
 <language name="French (France)" key="fr-FR" />
 <language name="German (Germany)" key="de-DE" />
 <language name="Hebrew (Israel)" key="he-IL" />
 <language name="Hungarian (Hungary)" key="hu-HU" />
 <language name="Italian (Italy)" key="it-IT" />
 <language name="Korean (Korea)" key="ko-KR" />
 <language name="Japanese (Japan)" key="ja-JP" />
 <language name="Norwegian (Bokml) (Norway)" key="nb-NO" />
 <language name="Portuguese (Portugal)" key="pt-PT" />
 <language name="Polish (Poland)" key="pl-PL" />
 <language name="Romanian (Romania)" key="ro-RO" />
 <language name="Spanish (Spain)" key="es-ES" /> 
 <language name="Swedish (Sweden)" key="sv-SE" /> 
 <language name="Russian (Russia)" key="ru-RU" />
</root>

Re-installing DNN, that would be the 5th time. I tried a couple of times to build one from the VSI file, and one from the Install file which I've downloaded. And every time I get the same errors.

Regards,

sorry, I mixed up the name. please check the /App_GlobalResources/locales.xml, there should be all installed lanugages listed. If there are special characters in it I would start with editing these entries.