Versions affected: f41 (beta), but had seen this problem since f38
How to reproduce:
Install Fedora in Portuguese Brazilian (PT-BR) and restart to complete installation
Check if LibreOffice interface is in PT-BR
Check Display language setting: Option (Alt + F12) > Languages and Locales > Display Language
While the formats languages are properly set in the right language (Portuguese Brazil and BRL), the User interface is completely in English with no options to change
This should either go into some user guide, or we can possibly document it as a common issue if this is really supposed to work and is just broken. I’ll wait for some more dev answers.