Multi language support

Steps to reproduce:

1. Add a second language to your site, let's use Portuguese, Brazil ( pt-br ) as an example.
2. Install social auth + a provider like Social Auth Facebook → .
3. Go to Facebook developers and create an app.
4. Configure the app accordingly and set up the Social Auth Facebook settings.
5. Open an anonymous window from the Portuguese login page at yoursite.com/pt-br/login
6. Use the provider to log in.

Expected behavior: Leave the page in Portuguese and return from Facebook to a page in Portuguese: yoursite.com/pt-br/user/{uid}

Actual behavior: Leave the page in Portuguese and return from Facebook to a page in English: yoursite.com/user/{uid}

Yes, @adinan cenci described the essence of the problem.

I will assign the issue to myself and try to prepare a solution.

I rechecked the described behavior on version 4.x and it looks like this problem is no longer relevant for the latest version of the module.

I checked on another provider, not on Facebook

1. added a second language (Spanish)
2. went as a user (anonymous user) in incognito mode to the site and switched to Spanish
3. clicked on the social network icon in the social auth block
4. logged in to the social network
5. the user was returned to the site in Spanish

Perhaps the problem may be relevant for 3.x. or older versions.