Ethnic lunch in Worcester?
Besides the previously mentioned places, there is also a Domincan/Puerto Rican place on Main Street next to Clark (and Saigon Restaurant).
But if you're looking for ethnic/Worcester food, I would strongly suggest Vietnamese as that seems to have become the dominant ethnic cuisine with 6+ restaurants in the city. My favorites are Anh Thu (on Park Ave) and Pho Dakao (also on Park Ave).
Don't limit yourself to what's immediately by the WAM, there's too much good food in the city!