re: Can you provide the code for the plugin part?
That’s actually impossible for me to do. For one, I do not even know the plugin you are using for translations. They generally have a function available that can ple placed to output the correct form data. I would need to know the plugin and that function name.
I do provide custom development work and I do have time I can do this for you. If you are interested, please contact me using the Contact link at the very bottom of the page and I’ll reply back with a quote.