Do you know any relation of Amir Khusrau(the very famous poet of olden times) with Jammu??
In the year 1317, Amir Khusro, the famous poet of Hindi and Persian, referred to Duger (Dogri) while describing the languages and dialects of India as follows: "Sindhi O’ Lahori O’ Kashmiri O’ Duger."
Let's learn little history about Jammu:-
The history of the Dogri language can be traced back to the times of poet, Amir Khusrau. It is in his list of Indian languages that the earliest known reference of the Dogri can be found.
As Amir Khusru lived from 1253 to 1325 AD, the existence of Dogri language earlier to 13th century is proved. Inscriptions dating from 12th century AD contain Dogri expressions.
He also formally made mention Gojri language in the list of eighteen Indian languages of his time.
Dogri has an established tradition of poetry, fiction and dramatic works. Recent poets range from the 18th century Dogri poet Kavi Dattu (1725-1780) in Raja Ranjit Dev’s court to Professor Ram Nath Shastri and Mrs. Padma Sachdev. Kavi Dattu is highly regarded for his Barah Massa (Twelve Months), Kamal Netra (Lotus Eyes), Bhup Bijog and Bir Bilas. Shiraza Dogri is a Dogri literary periodical issued by the Jammu and Kashmir Academy of Art, Culture and Languages, which is a notable publisher of modern Dogri literary work, another being the Dogri Sanstha. Popular recent songs include Pala Shpaiya Dogarya, Manney di Mauj and Shhori Deya. The noted Pakistani singer Malika Pukhraj had roots in the Duggar region and her renditions of several Dogri songs continue to be popular in the region. Some devotional songs, or bhajans, composed by Karan Singh have gained increasing popularity over time, including Kaun Kareyaan Teri Aarti.
Dogri programming features regularly on Radio Kashmir (a division of All India Radio) and Doordarshan (Indian state television) broadcasts in Jammu and Kashmir. However, Dogri does not have a dedicated state television channel yet, unlike Kashmiri (which has the Doordarshan Koshur channel, available on cable and satellite television throughout India).
The Greek astrologer Pulomi, accompanying Alexander in his 323 B.C. campaign into the Indian sub-continent, referred to some inhabitants of Duggar as "a brave Dogra family living in the mountain ranges of Shivalik." [Source: (Translated from) "Dogri in the family of world languages," Balkrishan Shastri, Dogri Research-1981, Dogri Research Centre, Jammu University, Jammu]