The Eastern Indo-Aryan languages, also known as Māgadhan languages, are spoken throughout the eastern region of the Indian subcontinent, which includes Bihar, Uttar Pradesh, Jharkhand, Bengal region, Tripura, Assam, and Odisha; alongside other regions surrounding the northeastern Himalayan corridor.

The (or Middle Indic languages, sometimes conflated with the Prakrits, which are a stage of Middle Indic) a historical group of languages of the Indo-Aryan family.

Schwa deletion, or schwa syncope, is a phenomenon that sometimes occurs in Assamese, Hindi, Urdu, Bengali, Kashmiri, Punjabi, Gujarati, and several other Indo-Aryan languages with schwas that are implicit in their written scripts.

The Central Indo-Aryan languages or Hindi languages are a group of Indo-Aryan languages spoken across Northern and Central India.

The Northern Indo-Aryan languages, also known as Pahāṛi languages, are a proposed group of Indo-Aryan languages spoken in the lower ranges of the Himalayas, from Nepal in the east, through the Indian states of Jammu and Kashmir, Uttarakhand, Himachal Pradesh and Punjab (not to be confused with the various other languages with that name) was coined by G. A. Grierson.