(DISGUISED AS A 1950'S SUITCASE AND HIDDEN IN THE SHED)
MARTIAN
sounds like a cross between Welsh and Chinese.
Much of it comes from the back of the throat, ripples along the tongue and slams into the roof of the mouth.
The intonation goes up and down a lot (which is pleasant) - but there are also a lot of startling exclamations mixed in, making the speaker seem aggressive to those who (like me) are used to speaking English.