"U filth umen", it says, "wi no dat u r not frum dis
time."
Another one screams: "U donut haf -> 2 col as 'kids'!"
And another one adds in the language of the past: "I didn't know
that the humans from back then were so rude."
The aliens look at you angrily, clearly disapproving your way of
talking to them. One of them raises his voice.