I saw at least a couple different reviewers mention (in Russian) that the 1990 Soviet movie Подземелье ведьм (The Witches' Cave) very liberally borrowed from Highlander. However none of them went into details.
Много сцен прямо таки содрано с популярного и нашумевшего зарубежного "Горца", вышедшего несколькими годами ранее. (source: http://otzovik.com/review_1571181.html)
A lot of scenes have been ripped off from the popular and famous foreign film Highlander, released several years earlier.
Is there a detailed explanation of what exactly The Witches' Cave did rip off from Highlander?