The only technical part is you must always vocalize in your own accent; as everyone’s muscles are formed by the age of fourteen, and these muscles form the sound of your accent, it follows that you’re going to end up in vocal trouble if you constrict your accent. That’s why you see Bono, you see Adele, you see certain performers who have put on a fake accent having vocal trouble—they’ve constricted their vocal cords to act in a way that they’re not built for.
