This idea came from when someone on Twitter asked Rick if Percy was Latino (from Spanish Harlem) and Rick didn't deny it. I took it a step further, but that development is for later. My Spanish isn't the best (I'm not technically fluent), but I wanted to actually write some dialogue in the language instead of just changing the font.

Mi español no es perfecto como debería ser el español de Leo y Percy, pues por favor dime cuando encontrarás un error si hablas español (y lo siento porque voy a escribir todo con errores). Necesito ayuda :( No uso vosotros porque no.

This fic will go on with the game and reveal some other probably-not-canon things about the rest of the characters, some more interesting than others and some more likely than others.

Takes place before Tartarus and before they get Nico.

"I'm going crazy from boredom." Leo threw down his fork and looked around the table at the rest of the Argo II crew. "Let's play a game or something."

"Like what?" Percy said eagerly, at the same time Annabeth started to protest on the grounds that they needed to have people get right back to being on watch after lunch. Everyone else's enthusiasm covered her protest.

"Like just a thing where..." he glanced around again mischieveously, "Where we all take turns going around the table saying something about ourselves that we don't think anyone else knows, and we get a point ourselves if no one knows it, but if someone does already know then they get a point and you don't. Oh! And it's also kinda a game of bs, cuz if you don't have anything you can lie about something and if nobody calls you out, you get the point, but if someone says they knew when it isn't even true, you get a point. And if someone calls you on your bs, they get a point, but if you were telling the truth, you get a point."

"Complicated." Percy chewed on his pizza.

"Does this game have a name?" Annabeth asked like that would somehow trip him up and make him forfeit the idea.

"Sí, chica. It'll be... 'Didn't You Know?' I thought of that just now. Pretty good, eh?"

Annabeth folded her arms but stayed in her seat.

"I'm ready," Hazel smiled in a sweet way that looked like she was ready to crush everyone and win.

"I dunno..." Frank hesitated.

"It'll be interesting!" Piper said, then charmspoke, "Stay and play with us."

Suddenly the whole room was completely on board with the idea.

"Cool. Who wants to start?" Leo offered.

"How about you. It was your idea," Percy said next to him, "And I'll be second. Clockwise, right? Or is that counter clockwise...?"

"You can be second," Leo said. "So, for me... I write left handed but do almost everything else right handed." He looked around and saw only mild surprise on everyone's faces. He smirked. "Que bueno, a point for me then. Who's keeping score?"

Jason's plate produced a pile of fries. "One for each point. Don't eat them." He gave Leo one and he raised it above his head, gesturing to it with one hand. "A point! My life's work!"

"Yeah, yeah." Piper pushed his hand down from the other side of Leo. "Percy's turn. I can't wait for this. Annabeth is about to get a point for sure."

Percy smirked at almost a Leo-level of mischievous.

Piper raised her eyebrows. "Maybe not. What you got, Jackson?"

"I'm sure nobody knows that my first language is Spanish."

"Come on, man." Leo sighed, "Don't you know not to bs in the first round?"

Percy's smirk didn't fade. "Did you just call bs?"

"I think we're all calling bs," Piper said. Everyone nodded.

"So I get a point from everyone if I'm not lying?"

"Yep, and everyone gets a point since you are. Unless you can prove it," Leo taunted.

"¿Qué me quieres decir?" Percy said right in Leo's face with a perfect Latin accent.

"Todo lo que querías," Leo said back, moving closer.

"Valdez, if you kiss my boyfriend, I will stab you."

Leo immediately jumped away.

"Puedes hablar español sin que sea tu primer lengua."

"Es verdad, pero ¿por qué quería aprender una nueva lengua si no lo necesito? No necesito saber español, pero lo hablo. Tengo que hablar inglés porque vivo en los Estados Unidos y tengo amigos quien solo hablan inglés. Aprendí inglés de español. Point: Percy. I basically just won. Surrender your fries." He spoke way faster in Spanish than he did in English.

Percy got a little more than the mild surprise that resulted from Leo's confession.

"Wait... really?" Jason was the most shook.

"Yeah." Percy impatiently reached for the fries himself and started counting out his winnings from across the table.

"Pero... ¿por qué? No eres latino o nada," Leo continued to look at Percy like he'd just grown another Spanish-speaking head.

Percy frowned and turned around from the fries to look at Leo. "¿Quien te lo dijo?"

Leo way now by far the most shook. "But you're not!" He protested in English as Percy swiped away his winnings and gathered them in front of him. Six salty points.

"Did you just try to tell me I'm wrong about my own ethnicity?"

"How did we get to that?" Piper asked quickly.

"In Spanish. Try to follow along." Percy chuckled a little as he put his bare arm next to Leo's. His was slightly lighter and had a different hue, but was noticeably similar to Leo's.

"The fuuuuuu..." Leo stared. "How didn't I notice? How did literally none of us notice that Percy isn't even white!?"

Annabeth looked more confused at that question than anyone. She put a hand on Percy's shoulder and whispered "Really?" Percy nodded back. Annabeth's eyes found a corner to gaze at while she questioned everything.

Percy tapped absently on the table and clicked his shoes together. "I have so much more. Can't wait. Can I get extra points for the shocking people?"

Leo blinked himself out of his thoughts. "Sure. The shock factor has been added. Freak people out and you get double the fries. Enjoy." Percy claimed the rest of his reward and promptly ate it, leaving him with just the six he had before.

He shrugged. "Bonus points for a snack. Victory tastes good."

"Moving on... somehow... from that frankly traumatic turn of events-"

"For traumatic can it be-"

"No more extra points," Leo said sternly, still retaining his joking nature. "Annabeth's turn. I bet you she's Vietnamese or something."

"I- no, I'm not- Percy, you have green eyes."

Percy swallowed another point and nodded. "Thank you. I hadn't noticed."

"But why are they not brown?"

"Um... because... both of my parents have green eyes...? That is how that works."

"But you shouldn't have light eyes."

Percy huffed. "Hazel?" He said, grabbing her attention, "Could you look at Annabeth for a second? With your eyes?"

Hazel didn't question Percy as she had been listening to the conversation, and showed her light golden eyes contrasting her dark skin.

"Fair enough," Annabeth conceded.

"Your thing, mija. You have to say your thing," Leo reminded.

"Right," She focused. "I can read braille."

"Question: What is that?" Percy immediately responded.

"The raised bumps that blind people use to read," Annabeth said patiently, keeping in mind for the first time that he might know the word in Spanish and not English.

"Oh." He nodded. "But you're not blind."

"That doesn't change anything."

Percy snorted indignantly and almost fell backwards. "Tell that to a blind person."

She ignored him. "Who knew that about me?"

Nobody.

"And no one is calling bs?"

Nobody.

"Great." She took a fry.

"My turn. I think I can top Percy's," Jason said with a twinge of nervousness in his voice.

Percy cracked his neck. "I'd like to see you try. Really, I would. I don't know what you could possibly say to rival mine."

Jason took a breath.

A translation of the Spanish parts of their conversation in a really rough format but they're in order and you can follow along

Percy: What do you want me to say?

Leo: All you want.

Leo: You can speak Spanish without it being your first language.

Percy: That's true, but why would I want to learn a new language if I didn't need it? I know spanish but I don't need it. I have to speak English because I live in the United States and I have friends who only speak English. I learned English from Spanish.

Leo: But why? You're not Latino or anything.

Percy: Who told you that?