It is probably going to have several federations of celtic and germanic origin in Northern Europe, personally I think Greece and the surrounding regions would be hellenized (Cyprus, Sicily, Adriatic coast, southern Italy), Iberia has celtiberians and other into-europeans as the dominant culture with a minor non-indo-european culture with more influence and diversity than OTL (more than one language (only Basque IOTL)). The Balkans is a mixed clusterfuck like OTL is my best guess. And Italy has a Greek south and a mixed north (Celts mostly, Oscans, Umbrians, Veneti, Etruscans, Latins, and Greeks mixed in).