Myself cloned git repository with the project of Thucydides.
In the file language_en_US.properties, all the Russian inscriptions are gibberish:
#sign.up.profile.heading=R—R°RRR"Rres R RSS"PEP"S
In the source code repository, everything is displayed correctly. Open in IDEA.
How to configure IDEA that it was okay to display the text?