It looks to me that you need to update your region settings. It should ask to restart. You'll then need to do an update to get Cortana.
I did that. It did the update. Phone language was still UK, Cortana nowhere ;-)
So you don't have the Cortana app under C?
No, it's not there.
What I find odd is that your language settings shows UK as 'enabled' where as mine shows as 'available'.
Have you tried a soft reset or tried removing the other language on there?
UK is not removable
I can also not switch to German. It seems really to be a funny 8X problem
Maybe I do a hardreset in a bit, I am still deciding.
Can you remove the German?
I think so. I'll try in a minute for your academic interest then I'll hardreset. I have my holidays, I have time. I'll just save my resent Whatsapp History as screenshots, then it will be okay.
Don't do a hard reset just yet! I'm wondering if it doesn't like having three languages...
Removed German, doing a restart now.
I think many UK people with an 8X have the problem, with only one language. Yeah, it had no effect. Let's do Whatsapp screenshots. ;-)
That's funny, English US is not available. There might be the problem I guess ;-)