MS Edge language based on user locale

So according to Microsoft documentation, the edge DefinedPreferredLanguages attribute can only be pushed out as mandatory setting, meaning "If you enable this policy, websites will appear in the first language in the list that they support unless other site-specific logic is used to determine the display language. The language variants defined in this policy override the languages configured as part of the https://docs.microsoft.com/en-us/deployedge/microsoft-edge-policies#spellchecklanguage policy."

Ok, that is not exactly what we want in our enterprise environment coz all we need is the default language as the SOE to start with and the user should still be able to change that. So, "If you don't configure or disable this policy, Microsoft Edge sends websites the user-specified preferred languages as part of the Accept-Language request HTTP header." sounds like the way to go..

Except when Windows preferred language (display language) is set to English (Australia) after downloading its language pack, Microsoft Edge picked English (United Kingdom) as the top preferred language. What the hack, Microsoft? There is clearly English (Australia) in the Edge language list.