| Language | ISO 639-3 | Scripts | No. of Speakers | Geographical Distribution |
| Angika | anp | Anga Lipi, Devanagari | 30,000,000 | Eastern Bihar, Jharkhand, West Bengal, Nepal |
| Bajjika | Devanagari | 11,738,000 | North-Central Bihar Eastern Terai | |
| Bhojpuri | bho | Kaithi, Devanagari | 23,384,562 | Western Bihar, Eastern Uttar Pradesh and Central Terai |
| Fiji Hindi[7] | hif | Roman and Devanagari | 460,000 | Fiji Islands |
| Kudmali | kyw | N.A. | 37,000 | Bihar West Bengal Orissa Assam. |
| Magahi | mag | Kaithi, Devanagari | 11,362,000 | Southern Bihar |
| Maithili | mai | Maithili, Devanagari | 13,500,000 | Northern Bihar Delhi Eastern Terai and .Maldives. |
| Majhi | mjz | N.A | 21,841 | Eastern Bihar, Nepal |
| Musasa | smm | N.A | 50,000 | Eastern Bihar, Nepal |
| Panchpargania | tdb | N.A. | 274,000 | West Bengal Jharkhand Assam |
| Sadri | sck | N.A. | 165,683 | Jharkhand Bihar and Bangladesh |
| Sadri, Oraon | sdr | N.A. | 1,965,000 | Jharkhand and Bangladesh |
| Sarnami Hindustani[8] | hns | N.A. | 150,000 | Suriname |
| Surajpuri | sjp | N.A. | 273,000 | Kishanganj, Katihar & Araria. |