yes
 | This template is used on approximately 6,000 pages and changes may be widely noticed. Test changes in the template's /sandbox or /testcases subpages, or in your own user subpage. Consider discussing changes on the talk page before implementing them. |
Usage
This template detects whether or not a given link (first parameter) is an interwiki link, or a local link.
Returns "yes" if interwiki, or "no" if local.