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Take user translation from boj-user-translation and shows on BOJ problem page (e.g. https://acmicpc.net/problem/2557). Problems translated by users are marked as yellow on problem listings. On the problem page, click the language button, and the translation is shown. You can see the translated pages index on https://github.com/kiwiyou/boj-user-translation/blob/main/index. If you want to use your own repository for translation, click the extension button and add your repository on the list.