I think the language is same but differ in dialect from place to place
Bhattiani, is a mixture of Punjabi and Rajasthani, spoken in Eastern Punjab.
Rathi, is very commonly spoken in Ratia and Tohana in India
Malwai, spoken in Eastern Punjab
Powadhi, spoken in Eastern Punjab
Pahari, has further dialects spoken in the mountains of the South Asian sub-continent. Pahari is spoken in Pakistan, India and Nepal. The word Pahari means mountain. This is the dialect of the people of the Mountains
Doabi, spoken in Eastern Punjab
Kangri, spoken by the Kangri people of North-western India. This along with Dogri has been made part of the Pahari Group. (Group for the languages spoken by the people living in the Mountains
Dogri, spoken by the Dogras in Pakistan and Indian, this dialect too like the Kangri is now part of the “Pahari Group”
Wajeerawadi, Spoken in Eastern Punjab
Baar di Boli, this is a foreign dialect which evolved mostly in the United Kingdom and is spoken by the immigrants living there. This has a number of English words. The word Baar di Boli means, language of the outside or language from the foreign land
Jangli, spoken in Pakistan side of Punjab. Mostly in Jhang, Khanewal, Chistian and Bhawalnagr along with adjoining areas. This is considered to be a very old dialect and is more like eastern Punjabi spoken in a Siraiki tone. Among the most distinct difference is the use of the word “Then” in most Punjabi dialects it is “tay” in Jangli it is “wut”. And the Jangli speakers have a tendency to use it more often than required.
Jatki, Spoken by the Jatts on both sides of Punjab
Chenavri, Spoken in Eastern parts of Punjab
Multani, more commonly referred to as Saraiki, it has a beautiful singing accent and like Jangli the huge use of “Wut”. It is spoken in southern Punjab, Multan and adjoining areas, approximately 10 million speak this language. This is probably the most melodic dialect of Punjabi, there are many people who consider this a separate language and there are many movements trying to promote this idea
Bhawalpuri, Spoken in Bhawalpur and adjoining areas. It is very similar to Jangli
Thalochri, One of the dialects spoken by the desert people of southern Punjab
Thali, One of the dialects spoken by the desert people of southern Punjab
Lahore-Gujranwala, Spoken by the people of Lahore-Gujranwala and adjoining areas
Chakwali, Spoken by the people of Chakwal and adjoin area. This is a southern Potohar dialect, very close to dialects spoken in Sahiwal region
Lubanki, an almost extinct dialect, was spoken in Rajasthan and Gujrat regions of India and in some parts of Pakistan
Ghebi, spoken in Pindi Gheb, Fatehjhang and adjoining areas, however it is spoken in a belt with a large mix Punjabi dialects
Hindko, Hindko is spoken primarily by the people living the North-West Frontier Province of Pakistan. Abbotabad, Haripur, Hazara, Mansehra and almost up to Kaghan. It is very commonly spoken in Peshawar. It is also considered to the language of the Punjabi speaking Pathans
Pothohari/Pindiwali, This is like the Pahari dialect of north-western Punjab and is spoken widely in the Potohar Plateau in Pakistan and also called “Pindiwali” the language of the people living in the Rawalpindi region
Gojri, This dialect was used by the Gujjars from both sides of Punjab. Mostly the northern part of Punjab
http://www.kwintessential.co.uk/language/about/punjabi.html