The order in which these languages arrived in Europe is as follows:
- Proto-Indo-European
- Indo-European (as a broader category that includes various branches)
- Germanic
- Latin
- Slavic
To clarify: Proto-Indo-European is the hypothesized ancestor of many languages in Europe and beyond, and it would have existed before the individual branches, including Germanic, developed. Latin evolved later as the Roman Empire spread across Europe, and Slavic languages emerged after that, influenced by both Indo-European and other local languages.