Huh, I just realized they didn't air that clip from the promo they've been airing all this week.
Reminds me of when they used clips they cut out of Noein for the bumpers on Ani-Monday. Or Mako's "Holy Bazongers!" making it into a marathon promo despite being cut from the actual broadcast version of KLK 9.
Episode 2 subtly explained it visually: the tech they have on them can translate the others' words into the language they understand. No need for interpreters in this future.
Again. Toonami didn't care about promoting celebrity voice talent for their own original programming, they aren't gonna do it for something they signed a license for.
Are all these Amazon kids mentally challenged to some degree? I know those last two are.