The english version shows as:
Welcome to the Bitcoin Core RPC console.
Use up and down arrows to navigate history, and Ctrl-L to clear screen.
Type help for an overview of available commands.
WARNING: Scammers have been active, telling users to type commands here, stealing their wallet contents. Do not use this console without fully understanding the ramification of a command.
It is just a warning about social engineering really... basically it says "don't just blindly copy/paste commands and/or the output to anyone that asks for it"...
Honestly, newbies probably shouldn't be playing with the debug console anyway
But, hopefully the warning is scary enough that anyone looking at the console will properly investigate what a given command actually does before they try and execute it!