Problem with Avast Security Mac display language

How do I change the display language?

Last month I went to Japan and brought my Mac notebook with me. After a few days, the update notification for the daily virus definition changed to Japanese. At first, I thought it was because my location at the time changed to Japan, and so, I ignored it. However, when I came back from Japan, the notification still is in Japanese. I open the program and the whole program interface changed to Japanese.

I thought if I wait for a few days, the program would change the display back to English, like it changed to Japanese. A week has passed and the program still is in Japanese.

I tried to uninstall and re-install the program but it didn’t change the language back to English, still in Japanese.

PS: This only happen on Avast Security Mac. No other program or the system language have ever changed.

This only happen on Avast Security Mac
Those who can answer Mac stuff is found in the Mac section

Avast Mac Security >> https://forum.avast.com/index.php?board=5.0

FAQ >> https://support.avast.com/

OK, I will try there. Thanks

I did not see your post in the Mac section so will provide a clue here.

I assume Avast chooses the region based on the settings in MacOS. See link below on how to change the region preferences in MacOS.

https://9to5mac.com/2018/08/09/mac-how-to-change-language-and-region/

Cheers,
Mac