Hello @ramaz55
Hope all is well!
I’ve tested the translations files from my end and strings “Upload a file”, and
“Cancel” are translated. Please see the attached screenshot:

Make sure that the translation files are located in /wp-content/languages/plugins/ and named bpfb-ru_RU.po and bpfb-ru_RU.mo.
If untranslated strings are different (in a different location), please share here a screesnhot.
Please advise,
Cheers,
Nastia
Hello @ramaz555
We’ve not heard from you in a while. I’ve marked this ticket as resolved for now, but if you need anything else at all, we’re here for you, please just reopen the ticket or create a new one.
Have a good day and take care!
Cheers,
Nastia