Vibe coded web app #4: Practicing Chinese grammar

September 10, 2026

NOTE: this is a Codex-generated blog post and app:

I added another Mandarin study tool to the site: a grammar game for practicing English-to-Chinese translation. This one focuses on putting sentences together, with 155 grammar rules and 1,550 exercises covering beginner through advanced patterns.

The game gives you an English sentence and a target grammar pattern, and asks you to type a translation in simplified Chinese. After answering, you can review the expected translation, pinyin, an explanation of the rule, and three more examples using the same pattern.

Each challenge tracks correct answers and streaks, and continues until you use up three lives. Answers are checked against a predefined list, so a valid translation might not match. When that happens, you can compare your answer and mark it as valid without losing a life, or count it as a miss.

There is also a grammar library for browsing patterns and examples. The app saves your progress in your browser, and you can skip sentences or rules you have answered correctly several times in a row.

Try it here: Chinese grammar study game. It runs entirely in your browser with no account required.