Apple DVD Studio Pro 4 - Manual (Page 367)

4 If desired, change the text in any text objects and buttons to what you want to appear
for that language. You can also change the font and color for each language.
5 Select any additional languages and set their asset files and text as you like.
When you choose a language that you have already configured with alternate assets, the
menu’s assets and text change to match those settings.
367 Chapter 16 Using Advanced Menu Features