add translation strings for future bell update

What does this MR do?

add translation strings needed in prod version before !2826 (merged) can be merged.

How confident are you it won't break things if deployed?

100%

Checklist

• no unrelated changes
• asked someone for a code review
• set a "for:" label to indicate who will be affected by this change
• added to the next milestone
• added an entry to CHANGELOG.md
• added a short text that can be used in the release notes