This looks really cool but I can't justify using it because of privacy concerns. Running this with a local ai and a strongly worded guarantee of no tracking/reselling of my metadata is something I would pay for.
At the moment, Lingoku browser extension does send text to LLms for processing, we don't sell user data, but i agree that simply saying 'trust us' isn't sufficient.
Supporting local LLM is something we are actively considering, though there are still real constraints on the user experience.