I would like to have this feature, because I can’t set language on device.
In my case I have special user for my display where I can see home status and leave home options. Default language is set in HA to Czech, that mentioned user have set Czech too, but on my computer. When that display start, HA is logged automatically by trusted network to mentioned user with right dashboard, but without other GUI parts, like header bar and left menu bar, where is possibility to change language fro this device in profile settings. So at this display is HA in English, because it’s system language, but I would like to have it in Czech.
I would like to have to possibility to force some language for selected users, because in some cases is not possible to change language directly on device.