"Pimsleur mode" does not seem to work, I do not hear the translation in English (tried French and Estonian).
Some cool ideas for the spoken translation - allow the translation to come before the original audio - even better, maybe make it configurable. Imagine being able to hear the original, then translation, then the original again! Another thing that would be great is to hear the translation with different levels of volume - maybe a bit quieter, that way perhaps the brain neurons wouldn't be bombarded so intensively. Also, some quiet pauses between the original and translation would help as well.