In the navigation menu, the "Build Your Own" link is hardcoded to http://developer.mozilla.org/en/docs/Extensions, despite documentation existing in other languages. We can't just drop LANG in there though, because documentation doesn't exist in all the languages we support.
Pulled from the feedback page, a good comment from Pawell: The Extension part of the link is usually translated. So, there is no way how to do this automatically. I would go with 'http://developer.mozilla.org' . _('sidebar_navlink_build_your_own_href') The same issue is with http://developer.mozilla.org/en/docs/Creating_OpenSearch_plugins_for_Firefox at search engines page. --Pawell 21 January 2007
I fixed this in SVN r2332. I added the links to the l10n file as suggested by Pawell (localizing the path, keeping the base URL hardcoded). I also localized all URLs that I could find to be present on MDC. The two msg ids are "sidebar_navlink_build_your_own_href" and "addons_searchengines_makeyourown_href" respectively.