Board Thread:General Discussion/@comment-45534093-20200419180202/@comment-1038387-20200419203447

The other language will have a language code in the url after the .com: /fr, /es, /de etc. And if it's in non-English, it generally won't show up in search results if the settings are set to English only.

The way to make two wikis "related" is not done via the url, but via interlanguage links. Though having the same name does help for SEO and findability.