Add support for other languages than Spanish

[MurzNN]

Your widget is great, thanks! But will be good to extend the list of supported language.
You can do this via adding integration for some online dictionaries, that provide integration via API, I've found several ones:
https://developer.oxforddictionaries.com/
https://dictionaryapi.dev/
I'll try to find more if you'll plan to improve this.

[librehat]

This was really just a proof of concept project so I won't be adding other APIs to it.