I received this beta update today (not announced yet ...).
I'm referring to this still existing issue:
As @LiquidTension said, you are aware of it; I just want to be more specific as I found out these details today.
In fact, the language of the message is correct except if you combine background Cityscape with themes Use system default / Light.
As I am now using System default + Data Web, the message appears correctly in French.
- Windows 10 2004 - Build 190