Before you can truly serve multicultural populations, you MUST learn about their history, particularly in the country you're serving them in. For example, learning the nuances of African American English should be met with an understanding of the Transatlantic Slave Trade. You can learn more about the history of AAE here: https://youtu.be/K7FIky7wplI?si=bKOdPGZjAKZ8YajB