The base language is one of the regional languages used in Aceh Province, precisely in Southeast Aceh. The base language is basically divided into 3 (three) pieces of dialeg, namely upstream (subtle), middle (medium), and downstream (rough). As time goes on, the Alas language becomes increasingly forgotten because the younger generation prefers to learn foreign languages to keep up with the times so that many Alas communities, especially the younger generation, cannot communicate using the Alas language. To preserve the Alas language, a technology-based dictionary application is needed that is developing at this time to help young people learn the Alas language. Improving the accuracy of string matching in translating the Alas language into Indonesian in the application in the dictionary application used to study the Alas language in this study used the Turbo Boyer Moore string matching agorithm. The results of this study are in the form of desktop-based applications that can be used easily on a computer with the results of Indonesian language translation search into the Alas language with accurate stringency accuracy efficiently and efficiently with minimum time. Keywords : Regional Language, Alas-Indonesian Indonesian Dictionary, String Matching, Turbo Boyer Moore.