How can I correctly set up a multi-language website without market tags?

[Paolo12]

Hello, I have the need to setup a website that has 3 languages en, it, es.

I would like the website to be divided based on language only, and not on market/location. 

So to have a structure where:

language = en "domain.com"

language = es "domain.com/es"

language = it "domain.com/it"

At the moment the website had been setup in a wrong way, and there are the following versions:

en-gb "domain.com"

es-gb "domain.com/es"

it-gb "domain.com/it"

United Kingdom is indeed setup as primary market, with the 2 secondary languages. 

I would like to keep the same url split, but without market specific tag in the hreflangs, only language.

I'm afraid to make changes and brake something, do you know how to help me on that?