This dialect of Mando'a was based on a fan's interpretation of and extrapolations from the Republic Commando lyrics; this is one of the oldest extant fan expansions of Mando'a: https://www.swgemu.com/archive/scrapbookv51/data/20070127004230/index.html
The moon of Mandalore did not exist until it was invented for The Clone Wars.
The only words for this dialect appear in TCW: The Mandalore Plot. No actual translation to English was ever given, though a best guess (given below) can be deduced using the above wordlist.
Calhava bru'chun dralshye'ran!
Se solu, se kad, se darasuum kote.
Kadi, se norm'iim.
Ki, kadi norm'iim.
Compassionate leaders shall burn!
My soul, my death, my eternal glory.
Goodbye, I sleep.
Yes, goodbye, sleep.
And the Concord Dawn dialect has "F", "X", "Z" and a couple of other letters Mando'a doesn't use.
So those guys are either named from a different culture, a different dialect, or (third option) their names have been corrupted by Basic over time.
Imagine that in four thousand years, Kal Skirata might be spelled "Kal Zkirada."
So, Xaga might have been "Shaga" (incorporating that "sh" sound the Mando like) and Zuka could've been Suka.
Ryan Kaufman (DHC Author & Former LucasArts Content Supervisor), forum post, September 14, 2005, https://boards.theforce.net/threads/mandoa-class-mandalorian-language.21531491/page-7#post-21561289
TheDave said: "Is the language spoken on Concord Dawn a dialect of Mando'a or is it completely different? Also, What form of Mando'a exactly are we speaking of in this thread (as in, which planet is this mando'a from, if mando'a is spoken in different planets like I'm assuming)?"
Mando'a is separate - it's an ancient language taken from the gray-skinned Mandalorians. Mando'ade have a lot of Concord Dawn blood in them (a factoid that I got added to continuity for reasons that will become clear shortly.) That's all canon/continuity.
Extrapolating here: Concord Dawn would probably be a different language but one that has picked up Mando'a words from long association. A lot of Mando'ade come from Concord Dawn and end up back there. The flow is from Mando'a to CDish.
EDIT: I should have added - there might be accent variations, but Mando'a has remained remarkably unchanged and unaffected by other languages, because the Mandos just switch to basic and Huttese when they need to. And it's consistent from place to place, because it's an intergral part of the culture - almost sacred, although that's not the right word.
Karen Traviss, forum post, September 14, 2005, https://boards.theforce.net/threads/mandoa-class-mandalorian-language.21531491/page-7#post-21563179
Legends Concordian/Concord Dawn (not the same as that of the TCW Mandalore's moon of Concordia) has these words:
Jangotat (from The Cestus Deception, by Steven Barnes)
Tat (Star Wars Insider 84, Guide to the GAR: Bacara found it difficult to converse in Mandalorian with his brethren as he learned the peculiar dialect of Concord Dawn, which uses words like "tat" instead of "vod" for "brother.") Note that this article came out before Traviss wrote the Mando articles for Star Wars Inside 86.
Neyar gain ... (Order 66: "Ner gai Bard'ika," he said. "Tion gar gai? Gar aliit?" He'd told her his name was Bardan, and asked her name and her clan name. .... "Arla," she said. She glanced at the nurse as if the woman was eavesdropping. "Neyar gain Arla Vhett." It wasn't Mando'a, but it was close enough for any Mandalorian to understand.)
Menav ni! Menav ni, taan! (501st: Jikla didn't speak Mando'a — no, it wasn't Mando'a, it was Concordian. That was Arla screaming ...)