Services and translated nodes I have a website where three languages are present. I am requesting nodes through the Services API endpoint and that part is working well.

When requesting a node via JSON, how does the API let me know the requested node ID is associated to translated nodes?

I know the translated nodes do contain a "tnid" record of the original node, but the original node doesn't have anything to indicate that there are translated nodes.
To know if there are translations available for particular node, You need to call the below function to get the available translation nodes.

$translations = translation_node_get_translations($node-&gt;tnid);


Ref : Function translation_node_get_translations

So what you can do is, You can call this function when you are returning node from service API along with translated nodes.

Hope this will help.

Thanks