Google offers a free app -- -- for its Android operating system that has a conversation mode, although the results you may get with it will be .

While it would seem that Apple's Siri voice app would be a natural for speech translation functions, it doesn't natively support the task. However, if you jailbreak an iPhone 4S, which is not recommended by Apple, you can run an app called which allows you to say something in your native language and Siri will display it on the iPhone's screen in one of 30 languages.

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