In response to Heather:
The main language spoken in Croatia is Croatian, which is spoken by 96% of people within Croatia (4,800,000 people) and approximately 1,400,000 in other countries including Austria, Bosnia and Herzegovina, Germany, Hungary, Italy, Slovakia, Slovenia. 90% of Croatian speakers are fluent in a second language, most commonly English or German.
Other languages spoken in Croatia include: Italian, Hungarian, Czech and Slovak. These languages are commonly used in neighbouring countries.
For further information on languages see the languages category of Nationmaster or the SIL Ethnologue.