Language Problem

[mozack]

Hi,

I have one website based on prestashop. I have my primary language as portuguese. But the localization is Brazil (portuguese).

Is there any way to put language as pt-BR instead of pt or br in header lang iso code?

I try to put something like if lang == pt put after -br but doesnt work... How can we do that? Put 4 letters language code instead of 2.

The code to my website must be pt-br and not just pt or br

Thanks

Mozack