0art51n wrote:
if i type my username ¨martijn¨ in the ¨other¨option, it looks like this : 0art51n 
Dat is het ingebouwd nederlandse vertaler
Seriously, that's a 
<Fn><NmLk> toogle on laptops.  It gives a 'numeric key pad' on keyboards that should not have one, but want one anyway.
Generally, there is a key with a 
blue Fn on it.  The 
Fn is for 
fu
n.  (The only thing missing is "U".)   Find the other key that if has a 'number lock' (
NmLk, frequently) on it.
Hit them both at the same time, try it.  It toggles;  m=0, j=1, k=2, l=3, u=4, i=5, o=6, p=*, 7,8,9 are 7,8,9, and 0=/, back and forth.  
It was done to confuse us.