It can be Sound of silence by Julesmonster https://www.fanfiction.net/s/6927266/1/Sound-of-Silence. In this story Justin doesn't pretend to be deaf or doesn't understand english it's because his brain doesn't interprets the sounds incoming or outgoing. He is communicating by writing and sign language and I think he can lip-reading.
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In this story Justin doesn't pretend to be deaf or doesn't understand english it's because his brain doesn't interprets the sounds incoming or outgoing. He is communicating by writing and sign language and I think he can lip-reading.