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gemini-cli - 💡(How to fix) Fix Vietnamese Input (Unikey) Glitches on Windows 11 [1 participants]

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google-gemini/gemini-cli#25851•Fetched 2026-04-24 06:14:04
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Fix Action

Fix / Workaround

Workaround:
The issue seems specific to recent updates. The only stable workaround found so far is to downgrade to an earlier, more stable version of the CLI.

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What happened?

There is a significant issue when typing Vietnamese using Unikey in the Gemini CLI. Even when both terminalBuffer and useAlternateBuffer are disabled in the settings.json, characters often disappear, accents are duplicated, or the cursor position jumps unexpectedly during input. This makes it very difficult to type long prompts or Vietnamese text accurately.

Configuration:

1 "ui": { 2 "terminalBuffer": false, 3 "useAlternateBuffer": false 4 }

What did you expect to happen?

Smooth character input and accent handling compatible with Windows input method editors (IMEs) like Unikey.

Actual Behavior:
Input lag, double-typing of accents, or missing characters when typing Vietnamese.

Workaround:
The issue seems specific to recent updates. The only stable workaround found so far is to downgrade to an earlier, more stable version of the CLI.

Client information

  • CLI Version: 0.38.2
  • Git Commit: b0ed611a0
  • Session ID: 0b664795-a90e-4411-b04f-c069f35fb4a4
  • Operating System: win32 v22.16.0
  • Sandbox Environment: no sandbox
  • Model Version: gemini-3-flash-preview
  • Auth Type: oauth-personal
  • Memory Usage: 252.0 MB
  • Terminal Name: xterm.js(6.1.0-beta.197)
  • Terminal Background: #191a1b
  • Kitty Keyboard Protocol: Supported

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extent analysis

TL;DR

Downgrade the Gemini CLI to an earlier version to resolve input issues with Vietnamese characters using Unikey.

Guidance

  • Verify that the issue persists with terminalBuffer and useAlternateBuffer set to false in the settings.json file.
  • Check if the problem occurs with other input methods or languages to isolate the issue.
  • Test the workaround by downgrading to a previous version of the CLI, as mentioned in the issue report.
  • Consider reporting the issue to the Gemini CLI development team for a long-term fix.

Notes

The issue seems to be specific to the current version of the CLI (0.38.2) and may be related to changes in handling input methods or character encoding.

Recommendation

Apply the workaround by downgrading to an earlier version of the CLI, as it is the only known stable solution at this time.

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gemini-cli - 💡(How to fix) Fix Vietnamese Input (Unikey) Glitches on Windows 11 [1 participants]