There appear to be several dialects of Wajarri / Wadjarri though the details are uncertain. According to Vaso Elefsiniotis of the Irra Wangga - Geraldton Language Program (2007 p.c.), the current understanding is that there are five recognised dialects of Wajarri (A39): Byro Wajarri in the east around Byro plains; Boolardy or central Wajarri around Boolardy/Wooleen stations; Ngunuru Wajarri around Belele station; Birdungu Wajarri to the north-east of Boolardy where the Murchison and Gascoyne Rivers begin; and Nharnu Wajarri. Elefsiniotis also comments that Birdungu is the name given by others to the Wajarri people who traditionally lived at the eastern or north-eastern boundary of Wajarri country, depending on the observer's perspective.

According to Marmion (1996:6-7) there are at least three dialects of Wajarri (A39). The dialect which covers most of Wajarri country appears to have no particular name other than Wajarri (Marmion uses 'Southern Wajarri' (and occasionally 'Central Wajarri') to disambiguate it from other varieties). The other two are Nhugarn A71 and Birdungu A40. Marmion (2007 p.c.) later says that Birdungu A40 is a compass term and is used to refer to people from around Meekatharra who are not Wajarri (or at least, not central Wajarri).

The Bundiyarra Aboriginal Community Aboriginal Corporation web site lists 'some' of the Wajarri (A39) dialects as Birdungu A40, Nharnu A115, Nhugarn A71, Byro A113, Mileura A114 and Ngunuru A112. Marmion (2015 p.c.) notes that in more recent times Wajarri (A39) varieties have been referred to by station names in the area, such as Byro station and Mileura station. In this way, some names may exist in parallel with older names: Byro Wajarri A113 is probably equivalent to Nhugarn A71, Mileura Wajarri A114 to Ngunuru A112. He also notes the ambiguous nature of the name Birdungu, meaning 'easterners'. Marmion says that more recently it has been used to refer to Ngunuru A112 but that it may also include Nharnu A115, this likely being the case for von Brandenstein's use of the term.

Watjanti (W13) may also be a dialect of Wajarri / Wadjarri. Douglas (1981:199) says that a comparison of Curr's Watchandie W13 data is obviously related to Watjarri (A39). Blevins (2001:3), though, says that Watchandi W13 is a dialect of Nhanda W14. Muliara  (W18) is another possible dialect of Wajarri / Wadjarri. Marmion (2006 p.c.) says that mulyara means 'east' and it could refer to a dialect of Wajarri A39 or a Western Desert language A80 variety, based on what Tindale (1974) and Douglas (1981) say.

Jaburu (W55) has also been linked to Wajarri / Wadjarri as a dialect, though its identity is uncertain as the name means 'north' in many languages of area. Dixon (2002) lists Ngarluwangka as a possible dialect of Watjarri (A39) but notes that it may be a separate language. This may in fact be Ngarla A48, previously known as Ngarlawangka. The locations appear to be adjacent.