A lot of it isn't actually copy paste, but just quality-of-life tricks to speed up card creation while going through lecture notes / reading an article.

e.g. we have tooltips+hotkeys that let you append the highlighted text to the front/back.

One-click card creation for language vocab is on our roadmap and will be a focus-area soon. We're focusing on students / teachers right now.

Edit: You may like our guide too: https://zorbi.cards/making-good-flashcards (based on SuperMemo's original article - but summarised for the average K-12 student)