I’m thinking to open-source the linguistic processing code sometime soon, it’s turning into something that could be useful for other projects. Also adding some other tools to make it a useful toolkit for creating language materials from movies/audiobooks etc. I was working on this (https://forum.language-learners.org/viewtopic.php?t=8699) before LLN. I have since made a new bluetooth version, where the code runs on a smartphone. It was going to be an open-source project, hope to get time for it again soon. Do you do any embedded/NRF52 experience? 
Made this in my room.
I’ll try get around to fixing up shortcuts for subs/translations soon, sorry.