Editing Template:User-multi/doc (section)

===Not a valid project or language code===
*<strong class="error">[[Template:User-multi|User-multi]] error: "xyz" is not a valid project or language code.</strong>

This error is produced if the template is not able to process the project parameter. The project parameter must either be a valid interwiki prefix or a valid language code. See [[Help:Interwiki linking]] for a list of valid interwiki prefixes, and the [[#Not a valid language code|section on language code errors]] directly above for more details on valid language codes.

If you are sure that the interwiki prefix is valid, but you still get this error, it might be a bug in the software. This template uses [[Module:InterwikiTable]] for interwiki prefix data, so you can check to see if your site and your prefix exist in the table and fix it if they don't. If that fails to resolve the problem, please start a new thread at [[Template talk:User-multi]].