On Fri, Jan 27, 2017 at 7:57 AM, Max Vlasov <max.vlasov@gmail.com> wrote:
Is there a way to get a localized version of section names of an article, for example "See also"?  Currently my question is related to section names, but in general I would like to get language equivalent for other semantic entities. Are there docs about such things? I tried to find but failed. 

For system messages, the docs are at https://www.mediawiki.org/wiki/Help:System_message

As Brad said, "See also" is not a system message but plain user-contributed content. The Translate extension has translation memory (ie. it remembers how user-contributed content was manually translated in the past), and translation memory support was planned for ContentTranslation too (not sure whether that happened already), maybe that can be used to get translations for expressions commonly found in wiki articles. The mediawiki-i18n list is probably a better place to ask about that.