I have the same issue described in https://moodle.org/mod/forum/discuss.php?d=408370 but instead of course names being affected, it was all assignment modules. No other modules were affected.
I'd like to investigate this further and figure out what caused the issue but I need some clues on where to look. I might be the database engine since I also use MYSQL but then wjy did only assignment modules get affcted when have complete courses in Arabic?
Looking for some insights.
**correction: SOME not ALL assignments