Follow these steps marked in red rectangles.
But anyway, you don’t need to bother with it. Sorry that the language of the emulator could not be changed. First, let’s set the system language to your mother tongue.
How to Use Memu Emulator to Play PUBG Mobile on MacOS PDF File? How to Download and Install the Memu App Player into macOSX? The Features of MuMu App Player for MacOSX: