Based in Portland, Maine, The Language Exchange provides a broad range of language related services to individuals and businesses statewide and nationally. I look forward to more workshops and classes at the Language Exchange. A huge thank you to Valerie and Kifah!” Casey Gilbert, Executive Director at Portland Downtown..Tierra Educational Center is a locally owned, independent language school located in NE Portland, Oregon. We offer small group and private Spanish classes of the highest quality for adults and children of all levels..Find Programs Today Spanish Language Classes Maine. Penobscot School is located in Rockland, Maine on the mid coast. Since , it has offered year round foreign language.