Why are Russian word files in properties displayed as bugs?

Question

Java

Hello everyone
I cloned myself a git repository with the fucydides project.
In the language_en_US.properties file, all Russian inscriptions are in shorthand:

#sign.up.profile.heading=Заполните профиль

In the repository sources themselves, everything is displayed correctly. I open in IDEA.
How should IDEA be configured to display text normally?

Answer 1

encoding
in English help is written in detail where to change, maybe the Russian documentation is
notepad ++ shows the encoding well and changes it seems to be accurate