I noticed that Cubase 13 has been mixing two different languages (Portuguese and English) on the icons, even though I have chosen English as the display language for the software. (Please check the pictures below.)
I didn’t have this problem with Cubase 10, 10.5, 11 and 12. There are other items that are shown in Portuguese and English. When I find them, I will share a screenshot here.
Or even to rename/remove Cubase preferences folder to get the factory settings? Cubase Preferences folders are: Mac: ~/Library/Preferences/Cubase X Win: %appData% \Steinberg\Cubase X_64
Where the X is the Cubase version (for example 13).
OK, the next step is to try to rename/remove the preferences folder, to get the factory settings (in your case, to migrate Cubase 12 settings to Cubase 13).
My Cubase 13 is running in a Mac Silicon system. It is mixing English and Spanish. My local language is Spanish, but I choose English for Cubase, and some menus appear in English and others in Spanish, it´s crazy…