Original Costa Rican Sign Language
Original Costa Rican Sign Language是一种手语，主要分布在哥斯达黎加。按 Glottolog 的评估，它的濒危程度为“濒临灭绝”。
手语是完整的自然语言，有自己的语法；它们与当地口语并不同源。
Old Costa Rican Sign Language is a deaf-community sign language of San Jose, spoken by people born before about 1945. Along with American Sign Language, it is one of the sources of New Costa Rican Sign Language.
摘自英文维基百科 · Old Costa Rican Sign Language · CC BY-SA 4.0