Recaptcha translation

I have seen there are many English words like 1. I'm not a robot2. Too few images selected. Please select all matching images.3. An error occurred while contacting the recaptcha service.How to translate all these sentences or any other English words?How to manage many languages on the same domain? -- You received this message because you are subscribed to the Google Groups "reCAPTCHA" group. To unsubscribe from this group and stop receiving emails from it, send an email to recaptcha+unsubscribe@googlegroups.com. To post to this group, send email to recaptcha@googlegroups.com. Visit this group at http://bit.ly/1dkFnYd. For more options, visit http://bit.ly/P65DvS.