Well, I grew up with the Kingston Trio's "Sold Out" album and its medley of two songs from Tahiti. In Tahitian, which is to say one of the Polynesian language groups. Well outside my area of expertise.

Is it a mondegreen when a kid desperately fabricates English from listening to a non-English lyric?

The chorus of the second song in the medley begins with a chant:

Toe- rau E! Toe- rau E! Toe- rau E! Toe- rau E!

And for no particular reason, I heard:

He took it a-way!
He took it a-way!
He took it a-way!
He took it a-way!