MediaWiki:Apihelp-import-param-interwikiprefix
For uploaded imports: interwiki prefix to apply to unknown usernames (and known users if $1assignknownusers is set).
Even for a low-activity wiki, hosting & rendering many HQ image files takes significant resources and comes with high monthly server costs.
If you're able, please consider contributing to keep the site running to help support this independent, ad-free, fan-run site. Thank you!
For uploaded imports: interwiki prefix to apply to unknown usernames (and known users if $1assignknownusers is set).