Traditional Chinese for 2k battery doorbell is broken

Hello there
I currently have a battery doorbell and 2 eufy 2c pro cams.
The default language setting for my eufy app is traditional chinese.
However, everything works great except for battery doorbell.
The notification I got from battery doorbell looks like German or some latin language.
and in eufy app, some settings in battery doorbell are described in German or some latin language as well.

Can you please fix this issue?
Thank you