Today, Google announced the integration of automatic translation of emails directly into the Gmail inbox. This integration takes the form of an option to be activated in the Labs.
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To translate your messages just go activate “Message Translation” under setting tab
2009-05-20_195820 When you receive an e-mail in a language not your own, Gmail helps you to translate in a single click. The function adds a clickable link that will translate all the messages received in a different language to that used by default.
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Check the new features for Google Mobile