Hello,
1) Why have you created 3 different files for the translation? http://prntscr.com/qtx95z
Translation file should be located at wp-content/languages/themes/xstore-ru_RU.po, not at wp-content/themes/xstore/languages/ because you will lose it after theme update. And of course, you should not have translations at all the possible locations because then they won’t work.
2) We have updated your translation using shared files from our clients https://github.com/OlgaBarlow/Translation-of-Xstore-theme/tree/master/Xstore
3) Finish translation if you still have missing strings https://gyazo.com/8745ea5e800c3518b0266937bd4d374d
4) Some strings could be located at XStore core plugin translation files https://gyazo.com/c7871b719339639d6dfcb620ace2c4f7
5) After theme and plugin updates don’t forget to sync translation files https://xstore.helpscoutdocs.com/article/103-translation-files-update
Regards