Identifying live, neutral, and ground wires cold
The green/yellow wire is almost certainly ground.  It looks like the case of the motor is metal so you should be able to verify that easily - set your meter to the lowest ohms range and probe the case and that wire.  It should read 0 or close to it.  It should read infinite (no connection) between case and the other two wires.

For typical european wiring, blue would be neutral and brown hot.  Or course, there is no proof they followed the standard properly.