It's conceptually interesting, but it also strikes me as a problem that doesn't need solving. Having worked with and taught foreign language, nobody learns the first 1,000 words of a language from a same-language dictionary, nor should they. Children learn from the world; adults learn from classes or a translating dictionary. (Only intermediate/advanced level learners start to use a native dictionary.) The idea of "b…
We of course did have the benefit of a teacher who would translate if absolutely necessary, but she also insisted on sticking to French in the lessons wherever possible from the very first day. It was far more immersive in my first year of French than e.g. my fourth year of German.
It seemed to work quite well.