strange messages on ps4 messager - possible code

[Panzerkampfwagen VI Tiger]

for a while from multiple users i have been recieving a strange nonsentical message with certain letters marked with an umlaut with my username at the end. has anyone else experienced this? might be gibberish or a code of some sort.it's the same message every time.

 

[Spooky Bones]

lay off the pervitin

 

[Panzerkampfwagen VI Tiger]

lay off the pervitin

Comrades listen up
I brought you something
This powder lets you fly
And quickly defeat every opponent