Standard Average European

Standard Average European (SAE) is a concept originally introduced in 1936 by American linguist Benjamin Whorf to group the modern Indo-European languages of Europe with shared common features. Whorf argued that the SAE languages were characterized by a number of similarities, including syntax and grammar, vocabulary and its use, as well as the relationship between contrasting words and their origins, idioms, and word order, which all made them stand out from many other language groups around the world which do not share these similarities, in essence creating a continental sprachbund.

Source: Wikipedia — Standard Average European (CC BY-SA 4.0)