Lisa Bullard 
My Language, Your Language [EPUB ebook] 

There’s a new girl in Romelie’s class named Camila. Camila speaks Spanish, and she’s teaching it to Romelie. That gets Romelie thinking. What other languages do people speak? Her own family uses English and American Sign Language. Her mom’s friend knows Somali and Arabic. Can Romelie discover more languages in her city? How are they like her own? How are they different? A diverse cast gives multiple points of comparison.