Champion voice lines and deaf players

My little brother is deaf and doesn't really have a way to experience the champions' taglines like the rest of us do. I was trying to find a way where he (and others who don't hear) could enjoy the champions' wonderful and often hilarious voice lines.

I was thinking of something along the lines of an optional separate chatbox that showed what nearby champions were saying, or an option to have small text appear near the champion as they said a voice line.

I'm hoping this brings a probably overlooked (and small) issue to riot' attention so they might think about putting some energy towards making the game as enjoyable as possible for a certain demographic of their players.

Also, if this is in the wrong place or could go someplace better, tell me where to put it.

I read through some of the other posts regarding deaf players' interactions with the game and it seems like a lot of people are (were?) concerned with global ults with an audible warning but no visual one. I think this might fix that issue as well but I'm less worried about the "unfairness" of the game and more worried about missing content since if it were that unfair for deaf players there would be less of them playing.

Thanks for any feedback, ideas, and/or help.