Word-by-word translations under the subtitles

Sometimes a whole-sentence translation does not tell you which word means what. A second line under the subtitles could break the sentence down word by word, and stay blurred until you tap it, so you get a chance to work it out yourself first.

A learner suggested this. It's loosely related to bidirectional translation, a technique some language teachers use where you translate a text into your language and back again to help it stick. We like the idea of borrowing a small piece of that here: word-by-word meaning, but only when you ask for it. It pairs with See subtitles in two languages, and both are part of Focus Mode vs Flow Mode.

If you want to see where the idea comes from: a meta-analysis comparing glosses in your own language against glosses in the language you're learning, a study on interlinear, word-for-word translation easing the mental load of reading in a new language, and a wider review of how glossing affects vocabulary learning over time.