I'm a Deaf gamer and I've talked with my other Deaf gamers, we're all frustrated with how half assed the creator of the game were when it came to incorporating subtitles into Fallout 4.
Why on earth did they have to stop at the Radio?
My hearing gaming friends all revealed how many informations they have obtained from the radios be it tidbits, music, distress signals, new missions, new updates, etc.
It is quite clear that Bethesda made Radio important this time round on Fallout 4 but I cannot for the life of me understand why they had to exclude subtitles for this game. It's bad enough that most Hollywood companies don't caption/subtitle songs being sung during a movie.
Hopefully there will be an update that will add those missing subtitles to the game.