Node-Red on bluemix provides a Watson Machine Translation node. Bluemix recently changed the translation APIs that this uses, releasing a new Watson Language Translation API. (see https://www.ibm.com/smarterplanet/us/en/ibmwatson/developercloud/doc/language-translation/migrating.shtml for details)
I think this is the reason I used to get an error message in Node-Red saying that the Machine translation could not be binded.
Could you please help?