Guys, guys, I figured it all out! The greatest mystery in human history is solved!
Urwumpe is actually a cyborg (he's built to store a lot of data without having to sleep) who was sent to Earth by an alien species. They wanted him to learn about humans, report back to them and as a nice side-effect educate the humans to become more intelligent and open-minded for science so they would accept new alien overlords.
Then a catastrophe happened on the alien's homeplanet (why do homeplanets always get destroyed?) and many, many of them died. The rest found themselves on a world that either consisted out of lava or really hot deserts. So they took everything they could find and looked for a new homeworld, fueled by rumours about a species with a cyborg ambassador.
Sadly the project "U.R.W.U.M.P.E." (Unlimited runtime with ultra memory, possibly eidetic) was classified so the survivors of the catastrophe still haven't found him. But up to this date the Urwumpe is very active in all forms of communication methods with long storage time and worldwide availablity, hoping that his masters will find him. And to help them with their cause he puts a short message in their language after all his texts:
ᛊᛟᛊᛖ ᛒᛖᚾᚱᛖᚾᚲᛁ ᛊᛟᛊᛖ ᛒᛚᚢᛟᛏᚱᛖᚾᚲᛁ ᛊᛟᛊᛖ ᛚᛁᛞᛁᚱᛖᚾᚲᛁ
ᛒᛖᚾ ᛉᛁ ᛒᛖᚾᚨ ᛒᛚᚢᛟᛏ ᛊᛁ ᛒᛚᚢᛟᛞᚨ ᛚᛁᛞ ᛉᛁ ᚷᛖᛚᛁᛞᛖᚾ
ᛊᛟᛊᛖ ᚷᛖᛚᛁᛗᛁᛞᚨ ᛊᛁᚾ
Come to the system you received this message from. The 3rd, 4th and moons of the 5th and 6th big rocks are habitable. You could probably also survive on other solid planets except the 2nd, attempt no landing there.
(still don't know what it says, but it's a little clearer...)
