Text shifting on Japanese hiragana/katakana

[adriankwiat]

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adriankwiat

Account config

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Current Behavior

When typing japanese characters in hiragana or katakana (I use Anthy typing method on linux), text constantly shifts (probably because before whole kana character is entered there is latin character shown, which has different width than kana), sometimes causing currently typed word to jump between lines

Expected Behavior

Text should remain in the same position

Steps To Reproduce

1. Switch Monkeytype language to japanese hiragana or katakana
2. Set system input method to Anthy (I don't know if other input methods or other systems have similar problems)
3. Start typing letters

Environment

• OS: Linux Fedora 43
• Browser: Firefox
• Browser Version: 146.0

Anything else?

Screencast.From.2025-12-17.00-35-25.mp4

[FosterHoulston]

Proposed fix in #7286. It limits IME preedit to the remaining word and renders target glyphs during composition to prevent line shifts when romaji becomes kana.
Tested on macOS Safari/Firefox/Chrome with Japanese-Romaji IME; line jumping is resolved.