Rarity: Oh, I modeled them after the adventures of Shadow Spade. Her stories are always full of mystery and suspense and, best of all... fabulous costumes!

Suspense : 긴장감, 서스펜스,

Oxford dictionary : A quality in a work of fiction that arouses excited expectation or uncertainty about what may happen

'a tale of mystery and suspense'

Rarity: [humming] Oh, uh, just making some minor adjustments. [blows on dress] Shadow Spade believes it all comes down to attention to detail. And so do I. There! Now it's perfect.

[door slams open]

Rarity: Heavens, yes! A chance to dress up, be charming and show off my newest femme mystique couture? I wouldn't miss it for all of Equestria.

couture : 여성복, 패션 디자이너

Rarity: Ooh, the rhinestones I ordered! [beat] Oh, my. Oh, there's been a mistake... I ordered dragon-cut stones, and these are hoof-polished.

Rhinestone : 장신구나 옷을 장식할 때 쓰는 모조 다이아몬드

Rainbow Dash: Let's grab some grub!

grub : 구어로 음식이라는 뜻. grab과 grub의 두운을 맞춤.

Spitfire: Wind Rider, I see you met Rainbow Dash! She's one of our most promising Reserves. She just might beat your record.

Promising : 전망이 좋은, 전도유망한

Misty Fly: Yeah, he's coming out of retirement to take the spot of honor in the center of our aerial flower formation tomorrow.

come out of retirement : 은퇴생활을 관두다

Rarity: That dinner was absolutely divine.

divine : 신의, 신성한; 아주 멋진

 

Spitfire: How lucky are we? Well, we better get some shuteye before practice.

shuteye : (구어) 잠

get[or catch] some shuteye : 한숨 자다

Rainbow Dash: I won't let you down, Soarin.

let down : ~을 실망시키다

Rarity: Ooh, you're Spitfire's mum? But I thought you were sick.

mum : 오타인가 해서 찾아봤더니 mom (엄마) 의 영국식.

Soarin: I have to warn you, if you sent that letter, the bylaws are clear. I'd have no choice but to ban you from the Wonderbolts forever. Understand?

bylaw (=bye-law, by-law) : 단체의 규칙, 준칙. 영국영어로는 지방법, 지방 자치잔체 등의 조례를 의미

Rarity: With me! Detective Rarity is on the case, and we are going to get to the bottom of this faster than my costume change!

on the case : 사건을 조사하여. be on the case는 사건을 조사중이다 라는 의미.

Rarity: [narrating] Rainbow Dash was getting antsy, but I had faith I could clear her name and find the real culprit.

clear one's name : ~의 결백을 증명하다. 남의 오명을 씻어주다.

Rarity: Oh, calm down, Rainbow Dash. We'll get to the bottom of this.

get to the bottom of : ~의 진상을 규명하다, 철저하게 조사하다.

Cinnamon Chai: No... because it was hard to tell! She was wearing a trench coat, sunglasses, and a scarf around her head that covered most of her face. But I do remember she had a really deep, raspy voice.

raspy voice : raspy의 뜻은 ‘거친.’ raspy voice는 거친 목소리, 쇳소리의 의미 (그냥 대쉬같은 목소리)

Rarity: [narrating] Rainbow Dash was obviously upset, but I had all my ducks in a row.

get/have one's ducks in a row : 만반의 준비를 갖추다. 화면에 오리가 지나감. 관용구를 이용한 장난인 듯.