Mantra Launches Korean Version of Langaku, Expanding English Edition to 11 Countries
Mantra is testing whether the retention model it built with licensed manga and AI support at home (over 1 million downloads in Japan) travels to markets where the learning goal is Japanese, with South Korea as the first localization rather than a translated copy of the Japanese version.
Reporting from 1 source: ASCII.jp.
Mantra Inc. has begun the first overseas expansion of its manga language-learning app Langaku. A Korean version launches on iOS and Android, letting users in South Korea read manga with the original Japanese text alongside a Korean translation and study Japanese. Separately, the English-learning version with a Japanese-language interface offered in Japan has been expanded to 11 overseas countries and regions, including the United States.
The Korean build is not a translation of the English-learning version sold in Japan. Its interface, learning features, and content were designed for people studying Japanese, so readers see the original Japanese text beside a Korean translation. Mantra says AI commentary explains vocabulary and grammar by the context of each work, and the app covers pronunciation and intonation for dialogue. The company ran market research in South Korea in 2025, found demand for reading Japanese manga in the original, and used that feedback to set the direction. Langaku launched in Japan in 2022.
Synthesized by Yomimono from the 1 cited source below, including Japanese-language reporting where cited, then editorially reviewed before publishing.
Sources
- ASCII.jp Mantra、マンガ語学学習アプリ『Langaku』の初の海外展開を開始