Most of the population ( as of 2000 ) speaks German ( 85.5 % ) , with Italian being second most common ( 4.6 % ) .
Serbo - Croatian being third ( 2.0 % ) .
Most of the population ( as of 2000 ) speaks German ( 85.5 % ) , with Italian being second most common ( 4.6 % ) and Serbo - Croatian being third ( 2.0 % ) .