And Basque, Maltese, Turkish and Georgian.
Magyar (Hungarian) and Finnish are both Uralic languages along with Estonian and the Sámi languages, but none of these are related to the Indo-European languages common in the other parts of Europe.
And while most of Europe’s extant languages are in the Indo-European language family, there’s still a fair number of differences between Albanian, Germanic, Hellenic, Celtic, Romantic and Slavic languages.