Please go to the BenQ website to download Display Pilot version 1.1.0.5 or later and install it, which will fix this issue.
In the new version, if you select a certain language in MacOS which is not supported by Display Pilot, it will default to the English version.
Current supported languages: English, 简体中文, 繁體中文, Deutsch, Español, Français, Italiano, 日本語, 한국어, Nederlands, Polski, Português, Русский, Svenska.