Fix volume and name of Latin American languages.

The maximum volume of the audio was different in two places. It should be 8 in both places.

The other change is the name of Portuguese and Castilian languages. In the old UI, the names were too long to fit entirely, but now we can use better names. "Brasileiro" and "Latino" are not name of the languages.
The preference between the names Castilian or Spanish is different in different countries.
http://en.wikipedia.org/wiki/Names_given_to_the_Spanish_language
http://en.wikipedia.org/wiki/File:Castellano-Espa%C3%B1ol-en.png