It’s kinda a joke, but would be kinda cool. They’d only have to negotiate with Ireland, so hopefully wouldn’t get too bogged down.
Same article written in Interlingua: https://ia.wikipedia.org/wiki/Interlingua
It's essentially a modern, cleaned-up Latin that any European can pick up quickly.
*cries in Hungarian*
Also https://en.wikipedia.org/wiki/International_English
Same article written in Interlingua: https://ia.wikipedia.org/wiki/Interlingua