Hi Przemek,
You don't need to account for separate 'pages'.
Simply create three sections for each of Page Header, GH, GF and PF and use a conditional suppression formula on each of them.
Ex: Conditional suppression logic for PH1, GH1, GF1 and PF1 would be:
{customer_language_code} <> 'EN'
where all the above sections hold info for 'EN'.
-Abhilash