Good night,
I have a similar problem with the Bing API. I just changed my request to jQuery and set up my Bing Client ID and my API Key, but the translation is not happening. I'm using Joomla 2.5 with version 2.1.5 component and 2.1.5 module version.
When I check the console after I click on the flags, it gets a 200 (OK) message, however translation never happens. If I enable redirect it works but I don't wanna display the google translation page and makes my CSS to crush I don't know why. In description it says you can perform an ajax Request, since I don't see the option that's actually the jQuery one so I'd like to make it work if possible.
Thanks in advance for your kind assistance