Where do I edit the "Welcome to [portal name]" message

Where do I edit the "Welcome to [portal name]" message

I am looking for a way to edit the "Welcome to" part of the message that is seen on the landing page (ex: https://help.zoho.com/portal/en/home). When I use the French interface, it doesn't make sense... I want to change it from "Bienvenue chez" to" Bienvenue au".

Thanks!