And local colloquialisms as well. I can tell you the secret to a Boston accent is to replace the r after a vowel with an h, and that’ll help you pahk the cah at Hahvahd yahd, but won’t do a damn thing when somebody tells you the food at a restaurant is wicked pissah, but warns you that it’s rainin’ feckin’ hahd out deyah so yeh better off takin’ the T to Southie.