A simple module that is very usefull for lang list. Certainly if multiselect is possible.
We hav all the countries of the world here.. Chosen offers you a simple textfield. When you click it turns into a list.
Every time you choose a county.. it is selected and put above.
You can configure when you will use chosen. A simple list of a few items does not need chosen.
There are global settings and field settings.
Chosen is third party. Via hun site kom je op de bestanden. Zet ze in de juiste map.