Original sentence: It was soon discoveredfound that they not only belonged to the Indo-European family of languages, but to the centum branch, which placed them linguistically closer to languages such as the Celtic, Germanic and Italic languages of Europe, than to the closer Iranic and north Indian languages
Edited sentence: It was soon found that they not only belonged to the Indo-European family of languages, but to the centum branch, which placed them linguistically closer to languages such as the Celtic, Germanic and Italic languages of Europe, than to the closer Iranic and north Indian languages