Maya can run in English, Japanese, or Simplified Chinese. It will choose the language to run in based on the language of your operating system.
You can set Maya to run in English regardless of the language of your operating system by setting the MAYA_UI_LANGUAGE environment variable.
In Windows, open your environment variable settings and create the MAYA_UI_LANGUAGE variable and set it to en_US.
On macOS, set the MAYA_UI_LANGUAGE variable on the command line: export MAYA_UI_LANGUAGE=en_US
Maya will now run in English.
To restore Maya to its default language on Windows, delete MAYA_UI_LANGUAGE from your environment variables on Windows.
To restore Maya to its default language on macOS, use unset MAYA_UI_LANGUAGE.