Calendar not translated correctly to Spanish on transition screens

Issue Summary

Calendar not translated correctly to Spanish when both Jira and user's preferences are changed to Spanish

Steps to Reproduce

1. Set both Jira and user's preferences to Spanish
2. Add a date field in a transition screen
3. Transition the issue and select the calendar icon
4. Content is still shown in English

Expected Results

All the content should be translated into Spanish

Actual Results

Content is still shown in English
Video attached

Workaround

Currently, there is no known workaround for this behavior. A workaround will be added here when available