OpenCode ingoring Italian writing #54383

Description

Summary

In the OpenCode Desktop prompt input, the native spellchecker is fixed to the English (en-US) dictionary. Any non-English text (e.g. Italian) is fully underlined in red, and there is no setting to change the spellcheck language or disable spellcheck.

Environment

• opencode version: 2.0.26 (desktop package deb2.0.26)
• OS: Linux 7.0.0-38-generic, Ubuntu 26.04.1 LTS, x86_64
• Terminal: OpenCode Desktop app (Electron 44.4.5), not a terminal emulator. Electron launched with --lang=en-US
• Shell: /bin/bash
• Install/channel: desktop, channel latest (from app-update.yml)
• Active plugins: None found in config

Reproduction

1. Open OpenCode Desktop 2.0.26.
2. Focus the prompt input box.
3. Type an Italian sentence, for example: Ciao, come stai oggi? Vorrei aggiungere una nuova funzione.
4. Observe that essentially every word is underlined in red.

Expected Behavior

Italian text should be recognized by spellcheck (use an it-IT dictionary), or OpenCode should expose a way to set the spellcheck language and/or disable spellcheck entirely.

Actual Behavior

All Italian words are flagged as misspelled and underlined in red. Only the en-US spellcheck dictionary is configured, so the whole sentence is underlined.

Additional Context

Verified on the running instance:

• ~/.config/ai.opencode.desktop/Preferences:
  "spellcheck": { "dictionaries": ["en-US"], "dictionary": "" }
• ~/.config/ai.opencode.desktop/Dictionaries/ contains only en-US-10-1.bdic (no it-IT-*.bdic).
• Electron processes (renderer and network service) are launched with --lang=en-US.
• app.asar contains no setSpellCheckerLanguages(...) call (0 occurrences), so Electron falls back to the app locale (en-US) and never downloads another dictionary.
• The input box is a standard Chromium editable field with native spellcheck enabled; the context menu exposes addWordToSpellCheckerDictionary ("Add to dictionary").
• No spellcheck/language option exists in opencode.settings or any OpenCode config.

Workaround tried:

• Right-click a flagged word -> "Add to dictionary". Works but only one word at a time, impractical for full Italian text.

Suggestions:

• Let the spellcheck language follow the OS/app locale (and download the corresponding dictionary).
• Expose a setting for spellcheck language and for enabling/disabling spellcheck.
• At minimum, allow disabling spellcheck for the prompt input.

Plugins

No response

OpenCode version

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Steps to reproduce

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Screenshot and/or share link

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Operating System

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Terminal

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