Indo-European
adjective language specialized uk/ˌɪn.dəʊˌjʊə.rəˈpiː.ən/ us/ˌɪn.doʊˌjʊr.əˈpiː.ən/
印欧（语系）的
related to the group of European and Asian languages that are spoken in most of Europe and in parts of Asia and that include English, French, Greek, Russian, and Hindi
Farsi is one of the Indo-European languages.
Irish is a Celtic language of Indo-European origin.