The relation of rapid automatised naming (RAN) to word recognition may depend on the phonological regularity of the orthography. This study examined differential contributions of RAN to reading and writing in Korean alphabetic Hangul, logographic Hanja (Chinese) and English as a second language among 73 fifth graders in Korea across 1?year. RAN was differentially associated between reading and writing in Hangul and English. After statistically controlling for age, gender, morphological awareness, vocabulary and phonological awareness, RAN was uniquely predictive of Hangul word writing but not Hangul word recognition, and it uniquely accounted for English word recognition but not English word writing. Meanwhile, RAN explained both reading and writing in Hanja. Findings were discussed in terms of their orthography characteristics and different levels of proficiency.