Portuguese Language stopped being supported in July 2020, and any changes and functions added after that have not received a translation.

• Looking at the official list of supported languages, Portuguese (Portugal) is currently not included: Manage your language preferences.
• The reasoning for keeping the language available in the language selection is for legacy purposes.
• We have a feature request asking to fully support Portuguese (Portugal), here: I18N-4291: Add support for Portuguese Portugal in Jira. Please direct your feedback regarding support for Portuguese (Portugal) there, this is important for our Product managers, who make the decisions of what is prioritized and implemented based in many factors, including the feedback shared in the feature requests.