Character mistake: When Clare explains to the main character the purpose of the sceptre he's holding, she says "It's value is only in the information that exists here." It's the possessive pronoun 'its', so it's got no need for its apostrophe here.
Character mistake: When you are required to pick up books in Diana's library for one of the mini quests, one of the books in your inventory is "Perennial's of Cape Vedra." It's a plural, 'perennials', no apostrophe.
Character mistake: When the protagonist reads the expedition diary, the entry "The cursed arrival of the Spanish Fleet" recites that "Many of the traveler's met their end", with an obvious grammar error.
Character mistake: The first time that Diana mentions the mysterious civilization that produced the 'treasure', she mentions that "They survived in isolation until the 1500's." It's a plural, 1500s, no apostrophe.
Suggested correction: Both versions are acceptable depending what style guide someone chooses to follow. Anyone saying different is just stating an opinion (well, until all style guides decide to follow one rule). It's similar to plural letters, as in "mind your p's and q's."
Other mistake: The protagonist reads the last will of his adventurer father, "Idaho Jones" The will supposedly also contains a 'candid photography' of the father, but in the screenshot where everyone stares in disbelief at what Mr. Jones and his lady friends liked to call "the kraken", the asset used to portray the back of the photo is one of a postcard.
