The Tanaka Triplets have a history with Karai, a history that the Kraang are not aware of, which shows yet another difference the Karai clones have with the real one: They don't speak Japanese.
In many Japanese shows and anime, there are moments where the cast are heard speaking English but doing so phonetically and often pronouncing words with a loud "Uh" or "Oh" sound. In Internet jargon this is known as "Engrish" as the L and the R are interchangeable in Japanese.