Welcome to the TheocBase forum @Danny
The translation of TheocBase is managed on the site bellow (have set the link to en->ru).
https://webtranslateit.com/projects/4411-theocbase/locales/en..ru/strings
Please send the mail you register with by PM or chat.
I am a volunteer using some time with the TheoBase team and trying do give support to the best of my ability