I'm using S7e, it is running Android Nougat.
I change locale from china to us, reset robots wifi, logged in.
Then was able to download ENG voicepack:
Also, all menus are in ENG also:https://www.youtube.com/watch?v=voa6ey6bg5M
I changed locale back to China, because i have another Xiaomi product and it cannot be find/used when locale is set to US.
ENG voice is left, but not seen on list and plugin is back in CN