Can you translate a birchat hamitzvah before doing the action? I.e. for Channukah candles, can you say each bracha followed (or preceded) by its translation, and then light? What about for reading megillah? [trying to find examples that have more than one bracha]. What about for a deoreita?
Igrot Moshe (OC 3:8) forbids translating or explaining prayers in another language at a time when interruptions are forbidden.