The Official International Translator Credits for the DB Franchise.

[Cure Dragon 255]

I know some names like Steven Simmons, Clyde Mandelin,and so on but I also wanted to mention other translators from other countries and make a list!

I know...

USA:Steven Simmons and Clyde Mandelin for Funimation Entertainment
Latin America:Brenda Nava for Intertrack/Audiomaster3000

To make this less confusing only mention the traslator if they worked directly from the Japanese version and did their own translation from scratch.

[Tian]

German (DBZ) - Thomas Maria Lehmann

Romanian (voice-over) - Stefana Savei

[Theophrastus]

Viz English manga:

Dragon Ball:
Mari Morimoto (Volumes 1-2, 5-13, 15-16) [Translation]
Lillian Olsen (Volumes 3-4, 14, 17-42) [Translation]
Gerard Jones (Volumes 1-42) [Adaptation]

Jaco the Galactic Patrolman:
Tetsuichiro Miyaki

[UltimateHammerBro]

For the European Spanish version:

* Ivars Bardzevics (DBZ 147-167, DBGT, most of the original films, DB Evolution).
* Francis Merino (Broly the Legendary Super Saiyan, Broly Second Coming, Fusion Reborn, Attack of the Dragon).

Extra info:
[spoiler]According to Mr. Bardzevics, the script they were given was in English, but its origin varied: sometimes it was translated from the original Japanese, sometimes from the French dub. Also, he commented on its poor quality, stating that many of the sentences were too short or didn't make sense in context.

DB and most of DBZ were done by a bunch of different translators, but I haven't found any names.[/spoiler]

[DragonDuck]

Danish (Manga): John Lysmand [1-42, movie animanga (Adapted from the German manga)}, Alex Jørgensen [Z series animanga (Adapted from the Japanese animanga)}
Danish (Anime): Søren Lampe (Adapted from the French dub)