Translation:
 
Panel 1:  
TS: “Tell me what you think of my Halloween costume that I made?”  
FS: “It’s amazing. Especially your new haircut.”  
Panel 2:  
TS: “But I’ve got magic that can improve my costume. Wanna see?”  
FS: “With pleasure, Twilight.”  
Panel 3:  
TS: “Okay, here we go!!!”  
Panel 5:  
TS: “What do you think?”  
Panel 7:  
TS: “Hey, come back!!!”  
Panel 8:  
TS: “It’s just a regular disguise. I don’t see what’s scary.”
 
Also, I apologize for being a Grammar Nazi, but I couldn’t help noticing some grammar errors and typos here and there:
 
“Di__s-__moi, t’en pen__s__e__s__ quoi” (also “que penses-tu du costume d’Halloween que j’ai fait” is more grammatically accurate; “T’en penses quoi?” would be better suited for panel 5)  
“qui peut améliorer mon costume.” (sounds better than “rendre mieux”)  
“Il est formidable”  
“Qu’en pen__s__e__s__-tu?”  
“Hey, mais revien__s__!!!”