There are number of ways to translate any text to different languages online like using Google Translate and Bing Translator. Twinslator is an online service for language translation of your Tweets. To get started, type tweet or message and then select translation language from drop down box.
Click the translate button, enter your Twitter login details to post translated message on your Twitter timeline. It has nice feature to post either translated text or both original and translated text in single click. You can select among “Twin your Tweets” or “Only Translated Tweet” and click the update button to post message on Twitter. Checkout Twinslator