I googled your tribe and Walmajarri has a lot of dialects.
Is this the google entry you are talking about:-
Walmajarri, Walmatjarri, Walmatjari, Walmadjari, Walmatjiri, Walmajiri, Walmatjeri, Walmadjeri, Walmadyeri, Walmaharri, Wolmeri, Wolmera, Wulmari
Bililuna, Pililuna
Jiwarliny, Juwaliny, Tjiwaling, Tjiwarlin
Communities with a Walmajarri population are:
Bayulu
Djugerari (Cherrabun)
Junjuwa (Fitzroy Crossing)
Looma
Millijidee
Mindibungu (Bililuna)
Mindi Rardi (Fitzroy Crossing)
Mulan
Ngumpan
Wangkajungka (Christmas Creek)
Yakanarra
Yungngora
The Walmajarri people used to live in the Great Sandy Desert. Subsequent events took them to the cattle stations, towns and missions in the North and scattered them over a wide area. The geographical distance accounts for the fact that there are several dialects, which have been further polarized by the lack of contact and further influenced by neighbouring languages. We are probbly a couple of teh major family groups who chose to sty in the desert, and look aftr the sacred water (LakeGregory) for all time.
To answer the obvious question, yes I speak and understand all the dialects of my language, as well as sevral other totally differentlanguages, such as Martu, Gija, Kukutja, Pintupi, Warlpiri, Pitjatjantara, Matjantjara, Wongi and a few others, but that i not uncommon amongst our people to speak a variety of tribal languages.
There are 1500 actual languages, but if you want to include dialects, then you would count more than 6,000 languages all together. My grandchildren spoke Walmajarri, Kukutja, and Pintupi before they started school to learn English. Walmajarri and Kukutja are the main languages here, and Pintupi goes from here, across Lake Mackay to Kiwirrkurra.
Regards
Tjupurula