Simplify the following text for a Grade 14 native English-speaking person.
Original: The Indo-European languages ( formerly called Indo-Germanic ) are a family ( or phylum ) of several hundred related languages and dialects , including most major languages of Europe , the Iranian plateau , and South Asia , and historically also predominant in Anatolia .
Simplified: The Indo-European languages are a family of several hundred related languages and dialects , including most major languages of Europe , the Iranian plateau , and South Asia .