German and French to start with.
Later for Spanish(Modern), Italian, Chinese(Traditional and Simplified), Korean, and Portuguese for Brazil.
Captivate does come with a French voice (Chloe) and a Korean voice (Yumi) so that would leave you with having to purchase about half a dozen additional voices (if they are available). Check this link: VoiceText. This is the product that used to be under Neospeech and the same source for the Adobe Captivate text-to-speech. When I looked into this about five years ago, Neospeech informed me that additional speech agents are about USD 1,000 per voice. You'd be looking at $6,000 for the voices. You would still need to hire a localization service to translate all the text into those languages. It's been my experience that this can be many hundreds of dollars per project per language. You might be better off hiring a full localization company to do all the work for you.