Aside from various grunts and dragonshouts, the Dragonborn is a silent protagonist. If that's not your thing, Mathiew May's Dragonborn Voice Over mod(opens in new tab) for Skyrim Special Edition will let you hear every dialogue line you select repeated out loud.
You can select from a handful of voice packs, each created with ElevenLabs AI. Skyrim's protagonist has more than 7,000 lines of dialogue, so you can see why it's easier to get an AI to generate dialogue than having someone sit down and record it. So far three voice packs are available, all based on women's voices. As well as the default, other modders have contributed voice packs based on Wang Yuanji from Dynasty Warriors(opens in new tab) and the female Sith Inquisitor from Star Wars: The Old Republic(opens in new tab).
May says this mod is a work in progress, with more voice packs to come as well as an update that will decrease the response time between player-character dialogue and non-player character responses. As you can see in the Dragonborn Voice Over showcase video(opens in new tab), there's about a two-second pause before NPCs reply after each AI-generated line. (It's worth noting that video doesn't use the current version of the default voice, by the way. And if you're wondering why Ysolda's dress looks weird, that'll be the Vanilla Skinned Mesh Physics Clothing mod(opens in new tab).)
We've recently seen other Skyrim modders use AI to add a fully voiced NPC companion to a quest mod, and make NPCs say a name of your choosing instead of calling you Dragonborn. There's also an ongoing project to give every NPC in Morrowind fully voiced AI-generated dialogue.
An older mod added a bunch of Bruce Campbell's lines to let you play Skyrim as Ash from the Evil
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