Manage mailing list in different languages

[Qerel]

Hi
qerel.com is an italian store created with Impulse Theme
Now we translated in into english and it has been published qerel.com/en
If a customer registers to get updates via newsletter , accepts then to join our mailing list
We manage then this audience to send different kind of communications/newsletter, actually using MailChimp but soon moving to Seguno.
I would like to have an automation which allows me to immediately discover and manage without manual tagging who is coming from qerel.com/en from who is coming from the italian website.
This allow us to send italian or english communications to the right audiences.
Is there anyway to do this?
Thanks