摩揭陀语 (मगही, Magahī, 也叫做 मगधी, Magadhī language) 是一种印度语言。名字来自它的祖先语言 Magadhi，其源头摩揭陀俗语据信是佛陀所讲的语言，并且是古代摩揭陀王国的语言。摩揭陀语密切接近于博杰普尔语和迈蒂利语，这些语言有时被称呼为一个单一的语言比哈尔语。这些语言和一些其他相关语言一起被叫做比哈尔语，形成了印度-雅利安语支的东部群组的一个子群组。摩揭陀语大约有1300万用户。

它曾被误认是印地语的方言，但最近已经被证明为是同孟加拉语、阿萨姆语和奥里亚语在一起的印度语言的东部群组的后代。它有非常丰富和古老的民歌和故事传统。它使用于比哈尔邦的8个行政区和贾坎德邦的3个行政区，并在西孟加拉邦的 Malda 也有些用户。

The Magahi language, also known as Magadhi, is a language spoken in parts of India and Nepal. Magadhi Prakrit was the ancestor of Magahi, from which the latter's name derives. Magahi has approximately 18 million speakers.

It has a very rich and old tradition of folk songs and stories. It is spoken in eight districts in Bihar, three in Jharkhand, and has some speakers in Malda, West Bengal.