In the clubhouse, Hiccup and Fishlegs were working hard on upgrading the Dragon Blade, speaking in a language only those two fully understand. Astrid, astride Stormfly, lands outside to hear them talking while hopping off Stormfly.
"Well, by my calculations, Hiccup, for the Dragon Blade to ignite in those kinds of wind conditions, it would require-"
"An additional half jar of Monstrous Nightmare gel." Hiccup finishes for Fishlegs, knowing that's what his best friend was thinking.
"Precisely!" Fishlegs agrees.
"Are you thinking what I'm thinking, Fishlegs?" Hiccup asks, and Fishlegs most definitely did.
"Build a new handle to hold twice as much gel." Both say in sync.
"Of course. Now, what gauge cylinder will we use? My brain says 10, but my heart says 13." Fishlegs debates as Astrid leans over to Stormfly, placing one hand under her chin and one on her snout.
"And that, girl, is a language we will never understand," Astrid tells her as the Twins approach her, Stormfly chirping before flying off.
"Yeah. You know, we, too, have a language you will never understand." Ruff explains, and Astrid stands tall, not surprised at this news.
"This is news?"
"No, seriously. We created our own secret twin language." Tuff explains.
"Yeah, just in case we ever got captured and needed to communicate in code," Ruff adds, using an example where it would be beneficial, like you taught her. Astrid sighs before speaking, knowing she'll regret this.
"Okay, I know I'm gonna regret asking this, but what exactly is your secret language?"
"It's complex, so try and follow along with that pretty little head of yours," Tuff says before facing his twin.
Tuff starts to speak to his sister while snorting between his words. Ruff replies while doing the same, and Astrid looks on unamused.
"We call it Boar Latin!" Tuff then explains after a minute of conversation in Boar Latin.
"Yeah. Genius, right? Oh, wait, uh..." Ruff then repeats what she said, but this time snorts her words.
"Can you believe it only took us 11 years to come up with that? I mean, 15 with the research and development," Tuff says as Dracul walks over, hearing enough of Hiccup and Fishlegs while sitting in the clubhouse.
"Tuff, aren't you only 17?" Dracul asks while leaning back on the doorway.
Tuff doesn't hear Dracul as he and Ruff keep talking in Boar Latin, causing Dracul to huff with amusement. Astrid lets them go for a minute before having enough.
"What's with all the snorting?" Astrid asks, unsure if the twins know she understands what they're saying.
"Uh, hello? It's called Boar Latin. Uh, boar?" Tuff explains.
"Yeah, heard of it? You can't have the Latin without the boar. Then it'd just be Latin. Duh. Everyone speaks Latin these days." Ruff explains, making Dracul look at them questioningly.
'They do?' Dracul thinks as the twins go back to speaking Boar Latin.
"Hey, just for the record, I understand everything you guys are saying," Astrid says to them while Hiccup and Fishlegs walk out, still deeply engrossed in conversation.
"That's ingenious, Hiccup."
"I wouldn't have thought of it if you hadn't suggested Changewing acid."
Snotlout and Hookfang land by Hiccup and Fishlegs talking; he nods to his dragon and points before turning away as Hookfang takes to the air. Tuning in to see what was happening in the Clubhouse makes him roll his eyes.

YOU ARE READING
The Adventurous (HTTYD Hiccup x Reader)
Fanfiction"𝕴 𝖑𝖔𝖔𝖐𝖊𝖉 𝖆𝖙 𝖍𝖎𝖒... 𝖆𝖓𝖉 𝕴 𝖘𝖆𝖜 𝖒𝖞𝖘𝖊𝖑𝖋." Y/n is a strange girl that came to Berk with her family at the age of five. She was always seen in the forest, dreaming of adventuring to the edge of the world. Hiccup was the Chief's s...