Exclusive to: 
The Ancient Lunarune Stones are Structures exclusive to Don't Starve Together, introduced in Return of Them. They can be found in the Ancient Archive biome. Their only purpose is to be examined by the player to reveal a part of the Ancient Civilization history.
Quotes
First
“So much knowledge, if only I could read it!”
–Wilson
“A bunch of old mumbo jumbo.”
–Willow
“Is nice statue, but is covered in scribblemarks.”
–Wolfgang
“Words of a dead language.”
–Wendy
“INSUFFICIENT DATA, UNABLE TO TRANSLATE”
–WX-78
“Fascinating! These glyphs seem to be the base that their language evolved from.”
–Wickerbottom
“Now that's a head scratcher.”
–Woodie
“These runes are... different.”
–Maxwell
“These runes are föreign tö me.”
–Wigfrid
“We sure wish we knew what it says!”
–Webber
“I'm afraid its meaning is lost on me.”
–Warly
“I can't make heads or tails of it.”
–Winona
“Oh, what's this? A bit of light reading?”
–Wortox
“Glorph... it too hard to read.”
–Wurt
“I sure wish I could read it.”
–Walter
“I won't waste my time trying to decipher this gibberish.”
–Wanda
Second
“These markings look different from the ones in the rest of the ruins.”
–Wilson
“If it doesn't burn I don't care.”
–Willow
“It was important enough to carve into stone, but we'll never know the meaning.”
–Wendy
“SUCH A CRUDE WAY OF RECORDING DATA”
–WX-78
“The introduction of shadow fuel must have had a tremendous impact on their culture.”
–Wickerbottom
“I never even got a handle on French, don't expect me to read that.”
–Woodie
“I can only glean a hint of their meaning.”
–Maxwell
“Perhaps they speak öf ancient battles.”
–Wigfrid
“So many secrets lost to time.”
–Warly
“Ancient writing ain't exactly my specialty.”
–Winona
“It seems they were quite enamoured with our fickle moon once.”
–Wortox
“Someone read story!”
–Wurt
“I wonder what it says.”
–Walter
“I'd go back and ask what it means, but this time period is a bit beyond my reach.”
–Wanda
Third
“So much knowledge, if only I could read it!”
–Wilson
“A bunch of old mumbo jumbo.”
–Willow
“Is nice statue, but is covered in scribblemarks.”
–Wolfgang
“INSUFFICIENT DATA, UNABLE TO TRANSLATE”
–WX-78
“These glyphs must pre-date their discovery of the shadow fuel.”
–Wickerbottom
“Now that's a head scratcher.”
–Woodie
“This symbol here keeps repeating...”
–Maxwell
“These runes are föreign tö me.”
–Wigfrid
“We sure wish we knew what it says!”
–Webber
“I'm afraid its meaning is lost on me.”
–Warly
“I can't make heads or tails of it.”
–Winona
“Now this one doesn't make much sense at all. Unless...”
–Wortox
“Glorph... it too hard to read.”
–Wurt
“I sure wish I could read it.”
–Walter
“I won't waste my time trying to decipher this gibberish.”
–Wanda
Fourth
“These markings look different from the ones in the rest of the ruins.”
–Wilson
“If it doesn't burn I don't care.”
–Willow
“It was important enough to carve into stone, but we'll never know the meaning.”
–Wendy
“SUCH A CRUDE WAY OF RECORDING DATA”
–WX-78
“This glyph in particular keeps repeating... if only I could decipher its meaning.”
–Wickerbottom
“I never even got a handle on French, don't expect me to read that.”
–Woodie
“"To change?" No. It's a name...”
–Maxwell
“Perhaps they speak öf ancient battles.”
–Wigfrid
“So many secrets lost to time.”
–Warly
“Ancient writing ain't exactly my specialty.”
–Winona
“Someone read story!”
–Wurt
“I wonder what it says.”
–Walter
“I'd go back and ask what it means, but this time period is a bit beyond my reach.”
–Wanda
Fifth
“So much knowledge, if only I could read it!”
–Wilson
“A bunch of old mumbo jumbo.”
–Willow
“Is nice statue, but is covered in scribblemarks.”
–Wolfgang
“INSUFFICIENT DATA, UNABLE TO TRANSLATE”
–WX-78
“Now that's a head scratcher.”
–Woodie
“These runes are föreign tö me.”
–Wigfrid
“We sure wish we knew what it says!”
–Webber
“I'm afraid its meaning is lost on me.”
–Warly
“I can't make heads or tails of it.”
–Winona
“Hyuyu, I shouldn't spoil the surprise!”
–Wortox
“Glorph... it too hard to read.”
–Wurt
“I sure wish I could read it.”
–Walter
“I won't waste my time trying to decipher this gibberish.”
–Wanda
Trivia
- The Ancient Lunarune Stones were introduced in the Forgotten Knowledge update.
- Only Wickerbottom, Maxwell, and Wortox are able to understand the stones to some extent, and have different quotes for each.