Sakis,

in general, yes, but you should also create a landing page (not necessarily dotnetnuke), that offers the language selection and forwards to the portal. if you have different skins for both portals, you might also include a link to switch to the other language portal.

Hi Sakis,

if you use fixed links in your skin, you either need adopted versions per portal or develop a custom skin object, that can be used as a switcher like the core [language] token.

If you use separate portals per language they will be completely independent in its site structure with separate files (including images), user base and permissions.

to add a new Portal go to

HOST-->Portals

there is a menu, not an add new portal.