Not sure if the translation will be effective, but the machine translation can translate between more than 40 languages.
To activate, go to the Settings column of your Twitter account and activate the feature.
You can adjust the Tweet translation so that it gets disabled when you don’t need it.
“Although Bing Translator relies on advanced translation software to provide Tweet translations, the results still vary and often fall below the accuracy and fluency of translations provided by a professional translator. For this reason, the original text is always displayed above its translation.”says a note on Twitter’s support pages.
Many of us experienced that machine translation is not always great. It often translates the words and misses out on the essence of the sentence. However, integration of the translation tool in twitter might help us in understanding the other language’s words at least.