set lang attribute according the selected language
set lang attribute according the selected language

rastislav-chynoransky/web-umenia-2,SlovakNationalGallery/web-umenia-2,SlovakNationalGallery/web-umenia-2,SlovakNationalGallery/web-umenia-2,SlovakNationalGallery/web-umenia-2,rastislav-chynoransky/web-umenia-2,rastislav-chynoransky/web-umenia-2