Johan Halmén
Grattis på födelsedagen, Jonatan Hedborg.
Thomas Fjellstrom
Jonatan Hedborg
You stalker, you!
Thanks! 
MiquelFire
Heppy Birthday
Crazy Photon
Felíz cumpleaños! (it was mine a week ago too).
bamccaig
Happy Birthday.
Arthur Kalliokoski
Tomasu's link has HBTV! Happy Birthday!
LennyLen
Many happy returns.
verthex
Happy birthday Jonatan and thanks for all your suggestions. 
OICW
As the people above me already said 
Ok. Happy birthday 
GullRaDriel
Joyeeeux aaaaaannniiiversaireuuuuh Jonatan ! (repeat 5 times)
Arthur Kalliokoski
for(int i = 0; i < 5; i++) printf("Joyeeeux aaaaaannniiiversaireuuuuh Jonatan !\n");
Some programmer you are! 
gnolam
Ha-ha-ha-ha den äran!
lambik
Nog vele jaren!
Jesse Lenney
Heppy Birtdeh.
I tried...
{"name":"sad+cake+2.jpg","src":"http:\/\/static.allegro.cc\/image\/cache\/5\/3\/53d8fba1ce3bd1ca523a6db7e87d5545.jpg","w":320,"h":240,"tn":"http:\/\/static.allegro.cc\/image\/cache\/5\/3\/53d8fba1ce3bd1ca523a6db7e87d5545"}