The closest thing I can think of that
might meet all your requirements to one extent or another is the Onyx Boox i62HD Firefly/Angel Glow. I don't know however if they come with any dictionaries. I know they support them, but I'm not sure if they're included or a separate purchase. You would have to get it from Europe AFAIK and it is a bit more expensive than many other devices.
http://ereader-store.de/en/onyx-boox...refly-8gb.html
https://onyx-boox.com/shop/onyx-boox-i62-hd-angel-glow/
Not sure if the Pocketbook Lux would meet your requirements or not, haven't really looked into it.