Marathi is one of the most widely-spoken languages in India, mainly in the western and central areas. It’s the official language and co-official language in the Maharashtra and Goa states of Western India, respectively.
Learning Marathi is far far easier than learning any other Indian regional language. You already know 80% of Marathi if you know Hindi.
Like all Indian languages, Marathi, has a tremendous well of spirituality running through the language, especially seen in the devotional poetry of the abhang, bhajan and ovi. Language and culture are highly intertwined, and learning the language is key to understanding this beautiful spirituality.