Chao-Ahn and her language barrier
I still can’t get over the fact that nobody bothered to find a way to communicate with Chao-Ahn the Potential in Season 7 of Buffy. So she spoke Cantonese when Giles only had a “thin” grasp of Mandarin. So what? Suddenly neither Chao-Ahn nor Giles could figure out that Mandarin and Cantonese basically shared the same written language? To the point that Giles had to draw stick-figure flashcards to inform her that she was in grave danger? To the point that he never even got her medical history (which would bring up her lactose intolerance and thus avoid the whole fiasco where Giles made her physically ill because “ice-cream is the universal language”)?
Buffy the general, training the Potentials into an army against the First, should’ve been concerned that one of her troops was missing the point of every one of her inspiring speeches, and more importantly, practical fighting lessons that could prove to be the key to survival on the battlefield. How could she be OK with allowing a Potential under her roof to be missing out on Slayer training like that?
Then there was Willow the bookworm, computer genius, and master of online search in one. And she (along with everyone else) never found a dictionary, online or offline? An ex-high school librarian surrounded by high school/college students and Slay allies who constantly research demons, couldn’t think of turning to books to break down this “formidable” language barrier in a college town?
And it’s not like they don’t constantly deal with challenging languages and texts. Latin spells never slowed down Willow’s spellcasting. The Hellmouth was full of items with inscriptions that required decoding, and prophecies that required translation. Giles spoke Sumerian and even Dawn had been (self-)taught enough of it to attempt a translation of the shadowcasters text. Sumerian, a language that’s been dead for millennia and is not even close to any modern language today outside of a few loan words. A language that’s only studied by scholars with very specific interests and not available at, for example, your local high school or community college.
But then came an actual human being whose very life had been entrusted to them, and nobody cared enough to find ways to communicate with her? Nobody tried to help?