After Weeks of banging my head it's sooo nice to see I'm not the only person struggling with this issue.
I am trying to create a 1903 build, via MDT, that is based on en-gb, but that a user can select to switch to either en-us, zh-cn or zh-hk.
Like others before me I can inject the LP's and LXP's but can't get the GUI to show an easy and visible option for the users to switch without having to download.
MS - C'mon this used to be easy - why have you over complicated it?
Thanks, btw, to all those who have contributed to this forum - it has certainly put my (almost mental) mind at rest. I can now see (and, after many weeks of head banging, produce evidence) that this is a wider problem.
If anyone does come to a sensible method of doing this via mdt with little user interaction - please step forward and share your knowledge (other wise we appear to be in the hands of, what so far has been an incompetent) Microsoft 😞