I'm willing to accept that he could. But I'm under the impression it would just generally be more entertaining if he simply never did anyways.It's not Breath of the Wild Link we're playing as though (BotW Link never got most of the magical items the first post notes as absent, for one), and also it wasn't the master sword itself that caused it - BotW Link got said sword at literally the start of his heroing career, whereas most Links have already had the time to get used to the pressure by the time they get ahold of the magical/divine artifact older than civilization itself.
Honestly, we've got no indication either way whether the Link we're playing as can talk or not.
Other than. Y'know. The QM-provided Vote option that explicitly has us talk. Unless aranfan's pulling some "say apple" thing on us, I think it's safe to say this Link is able to talk.
On a completely separate note, what the heck do those stats mean? I've tried googling it, but I can't figure out what to google to actually get a breakdown of how stats work in Warhammer Fantasy Battle, so I've got not a clue as to how good/bad Link is.