do not delete all occurances
I added a word for the second time, saw that it has different meaning than previous time, so I tried to highlight a longer phrase to differentiate it (as there is no option to split flashcards). Instead of having a phrase and the old word with original translation I have only the phrase because the word was deleted totally (also with the old meaning). You could process a word with it context in order to not make this mistake. And give as an option to split flashcard by different meanings. Writing out every meaning in one field isn't very comfortable and I don't think it is good for the learning process.