Hi Goliard,
Can you add a screenshot please? I just tried with Edge, Opera and Chrome and it's working.
EDIT: I've been working on a new multilingual model; now the application appears in English by default, both the application itself and the preview. This should have resolved your issue.
To add other languages, you need to click the "CONFIG" button. If you change the interface language and have added the language via "CONFIG", the preview will change dynamically.