Actually, according to the last StrikerS sound stage, both Nanoha and Raising Heart had their magic capabilities permanently damaged by her going overboard during the final battle. It's said that she would be able to recover if she took a few years off, but she flat-out refused and instead devoted herself even more to teaching, going so far as to teach each one of the forwards one of her trademark spells. IIRC she taught Subaru the real Divine Buster, she taught Accel Shooter to Caro, she taught the ACS System to Erio, and she taught Tiana Starlight Breaker.
As far as I know, there's no full translation of the soundstage in question, though. It's just the word from people who can more or less understand it.