Hello.
According to JAR-OPS 1 (JAR OPS 1.205 bzw. IEM OPS 1.205) airlines are not required to have their dispatchers licensed by law. National law may apply, but for Germany for example, you can get a german dispatcher license, but you dont neccessarly need to have it.
A lot of the smaller airline businesses hire people with the FAA license.
Only a few carriers offer the possibility to do the german licence, which is quite expensive e.g. Lufthansa etc.
I am thinking of getting the FAA licence aswell. Today I do loadcontrol for a big german charter carrier.
Bye
Jan