Considering these are uniliteral signs, they would be transliterated something like this:

𓏲𓄿𓏏𓋴 𓅱𓊪 𓆑𓅱𓎡𓎡𓂋𓋴 𓉔𓃭 𓋴𓏏𓄿𓂋𓃭𓇌𓏏 𓊪𓂋𓄿𓇌𓋴 𓄿𓏏𓅱𓅓 𓊪𓂋𓄿𓇌𓋴 𓎡𓎡

wꜣts wp fwkkrs hl stꜣrljt prꜣjs ꜣtwm prꜣjs kk

–What’s up, fuckers!
–Hello, Starlight.
–Praise Atum! Praise Kek!

Even better than not citing her sources, Starlight is referencing a history that Twilight is just completely unfamiliar with. I think only Discord and Pinkie Pie could possibly understand what the Hell is going on xD .

@Background Pony #DC07  
Whst can she do? There legitimate commissions and Rarity doesnt know where the money comes from. And then the Taxpony comes with the tax bill on her castle.
 
And Starlight buys it at the tax sale.

Nefertiti : yay new Friends! 😄

@Iron Storm  
I like it. Twilight doesn’t know yet, but when she finds out…

Rarity is making a killing making these costumes for Starlight.
 
And Starlight is using Twilight’s money to commission them.

Somnambula: Oh, a new friend.

I’ve tried to read the hieroglyphs:
 
First picture:
 
Starlight Glimmer:  
-What up goors (means: girls)?
 
Second picture:  
Celestia:  
-Hi (or “hey”) Starlight Glimmer  
Starlight Glimmer:  
-Atum Glimmer u…

@Background Pony #DC07  
Can’t much about ancient Egyptian, but I do not that it’s written in vertical columns. This looks like it’s done left to right.

Does the Egyptian writing mean anything, or is it just copied from some convenient source?
 
Also,  
@Slamjam  

 
I just realized that’s a unicorn smiley.

@Hermaeus Xerxes  
The Egyptians hieroglyphs were meant to symbolize common things the people would see and be easy to understand. Like birds, wheat, bowls, snakes, and so on. This was so when they used the symbols to construct words, the explanation of the word was derived from the meaning of the combined symbols. This is why they said their words had the magical property to instantly transmit the information of said word just by its utterance. Like casting a spell of knowledge, which is also why the word: spelling has to do with magic and the creation of words. ^;)

You could just try asking her to include citations, Twi. Maybe next time when she sails a junk into town as Cheng I Sao, she’ll hang a placard round her neck with a list of her sources, and raise a card with those numbers in square brackets whenever she’s roleplaying a scene from proper history.
 
I mean she and Celestia are apparently conversing in Egyptian no problem, so she must’ve done some research.

I like to think Tia is really happy to have someone to talk to in such an ancient language.

No sources is the bit that probably hurts Twilight the most.

This is not good