(Shameless plug) Only marginally similar (though I imagine you can adapt it to the same purpose), but I also created a GUI tool [1] for quickly making Anki card

(Shameless plug) Only marginally similar (though I imagine you can adapt it to the same purpose), but I also created a GUI tool [1] for quickly making Anki cards when reading foreign language texts. It's also not electron, but rather PyQt, so it conforms to your system theme if you are on Linux. [1] https://github.com/FreeLanguageTools/vocabsieve https://github.com/FreeLanguageTools/vocabsieve