SLA date is not translated properly to Russian language

Summary

SLA date is showing in English
Steps to reproduce

Change user profile to Russsian
Browse any Service Desk issue that has SLA and notice the "-12w" instead of "-12н".

Expected Results.

JIRA should translate the week and month to

days - дни - д
weeks - недели - н
month - месяц - м

you see, for hours - часы - ч - all is fine.