Last time I tried Qubes, the default keyboard layout was that of dom0. Is this still the case? If so, that is very problematic.
Consider the following scenario:
You live in a not very large country. Let's say Sweden as an example. According to the Tor project, there are around 5000 Tor users in Sweden. How many of those do you think use Whonix? 100? How many of those do you think use Qubes-Whonix? ... 5-10?
So, you're a Swedish Qubes-Whonix user, and someone exploits your browser. Normally this would not be a problem. But since your keyboard layout is Swedish, you're now essentially de-anonymized, as there are only a handful of Qubes-Whonix users in your country.
The default layout should be US or something.