Modify the "warning" message when looking up for languages not supported
Fragment of a discussion from Support/LiquidThreads
How about an alternative wording "The language code is not recognised or is disabled" (the message appears both where no portal exists and where the language has been disabled (example). Perhaps we could link with the help page Translatewiki.net languages with a link text something like "Read about languages supported at translatewiki.net and request a new language".