I have noted all the known, or alleged dubs in their respective languages, but does anyone know any more?
These are all the lost dubs I've been made aware of, some through my own research and others from talking to other fans:
Albanian
- OG Dragon Ball episodes 1-13 (not to be confused with the later, illegally produced Albanian dub, this dub aired on Kohavision in Kosovo sometime between 2000 and 2002, but has not been seen since)
- OG Dragon Ball movies 2-4 (VCD only release)
- OG Dragon Ball (said to have been dubbed and aired on some local Chinese channels)
- OG Dragon Ball movie 1 (rumoured 1987 Frontier Enterprises dub)
- OG Dragon Ball (RPN9 dub)
- OG Dragon Ball (Animax Asia dub)
- Dragon Ball Kai (technically not lost, but Ocean Studios have an unaired dub that will hopefully see the light of day)
- OG Dragon Ball movies 1-3 (possible alternate dub aired on Toonami Asia in 2016, but it may have been a dub we know, as no one has ever reported on these airings to my knowledge)
- OG Dragon Ball (SBS dub)
- Dragon Ball Z (SBS dub)
- Dragon Ball Z first few episodes (VHS only possible English dub or Korean voiceover)
- Dragon Ball Z movies 1 and 6 (VHS only)
- Dragon Ball Z movies 2-13 (Daewon Broadcasting dub)
- History of Trunks (Daewon Broadcasting dub)
- Dragon Ball Z Movies 1-8 (Sima Studio dub, aired on 4Anime in Iraq)
- OG Dragon Ball movies 1-4 (possible Txhais Lus Production dub)
- Dragon Ball Z movies 1-3, 5-13 (possible Txhais Lus Production dubs)
- Dragon Ball GT (Indosiar and Global TV dub)
- Dragon Ball Kai (distributed by Reka Citra Suara or Erfas Studio and aired on Indosiar)
- OG Dragon Ball movie 2 (CN Asia dub)
- OG Dragon Ball movie 4 (Vision Interprima dub)
- OG Dragon Ball movie 4 (CN Asia dub)
- Dragon Ball Z movies 2 and 4 (CN Asia dub)
- Dragon Ball Z movie 4 (Vision Interprima dub)
- Dragon Ball Z movies 14-15
- Dragon Ball Super Broly
- OG Dragon Ball (Junior TV dub)
- Dragon Ball Z series (aired on A1)
- OG Dragon Ball (TV2 dub)
- OG Dragon Ball (Astro Ceria dub, may or may not be a separate dub)
- Dragon Ball Z movies 8 & 13 (Speedy Video dub)
- Dragon Ball Z (TV2 dub)
- Dragon Ball GT (TV2 dub)
- Dragon Ball Kai (CN Asia dub)
- Dragon Ball Z (Movie 6 dub for mainland China)
- Dragon Ball Super Broly (Taiwan dub)
- Dragon Ball Super Broly (Mainland China dub)
- OG Dragon Ball episodes 1-139 (possibly a voiceover rather than a dub, aired on TVR1 and TVR2)
- OG Dragon Ball (original dub aired on IBC-13)
- OG Dragon Ball (redub aired on QTV Channel 11)
- Dragon Ball Z (second dub of series, possibly aired on GMA Network)
- Dragon Ball GT (second dub of series)
- Dragon Ball Kai
- OG Dragon Ball movies 1-4
- Dragon Ball Z and GT TV specials (possible dubs)
- Dragon Ball Z movies 1-13 and 15
- Dragon Ball Super Broly
- Dragon Ball Z (Sound & Vision Studios dub with edited episode numbering 1-276)
- OG Dragon Ball (Modernine TV dub)