Sorry if that's an obvious suggestion, but did you try scrolling down with your mouse on the list of the available options? I also had this issue of not having uninstall there, and turned out it was a scrollable list.
However after uninstalling the game and trying to install again, I don't even have "English" available from the dropdown in language selection, only Russian, Czech and Polish.
I reached out to support, they said it's a bug and they forwarded it to tech team and said they can't tell how long it might take to fix.
