The term 'Indo-European Language' refers to a large family of languages that are spoken in many parts of the world. This family includes CELTIC (6 letters), ARYAN (5 letters), SANSKRIT (8 letters), Oscan (5 letters), Slavonic (8 letters), Avestan (7 letters), Armenian (8 letters) and MACEDONIAN (10 letters). These languages are believed to have originated from a common ancestor language, and are characterized by similar grammar and vocabulary.