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Release 1.9.1

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5DO documentation edited this page Nov 14, 2026 · 1 revision

5DO 1.9.1

Released: 2026-11-14

5DO 1.9.1 is a localization and quality-of-life update. It adds seven UI languages to English and German, fixes switching the desktop back to English without a restart, and adds a two-step Escape pause/quit shortcut. The emulation core and compatibility model are unchanged.

UI languages

  • Brazilian Portuguese (pt-br), French (fr), Spanish (es), Italian (it), Japanese (ja), Korean (ko), and Simplified Chinese (zh) join English and German.
  • Each catalog covers every non-tooltip shell/dialog/CLI string plus the core shell tooltips; missing secondary tooltips fall back to English.
  • Settings > General > UI language lists all nine catalogs. --locale <code> overrides the saved setting for one launch; --list-locales prints the catalogs.
  • pt, pt-PT, and pt-BR resolve to pt-br; zh-CN and zh-Hans resolve to zh.
  • The desktop executable writes --list-locales as UTF-8.

Fixes

  • Selecting English after German now restores the English labels immediately instead of requiring a restart. The same fix works when the launch used --locale.
  • The three analysis-only GameLibraryWindow symbol errors reported by jb inspectcode are resolved.

Two-step Escape

  • The first Escape while a game is running pauses it and shows Paused. Press Escape again to quit.
  • The second Escape closes 5DO.
  • Fullscreen exit, the quick menu, the library, and text entry keep priority. Resuming, stopping, opening the quick menu, or losing window focus disarms the quit step.

Validation

  • Full suite 2,259/2,259 passes in Debug with .NET SDK 11.0.100.
  • Build, locked restore, dotnet format --verify-no-changes, and jb inspectcode --severity=WARNING are clean.
  • Trimmed win-x64 CLI and frontend publishes pass; the frontend smoke writes FRONTEND SMOKE OK 1.9.1. French and Japanese smoke runs write firstMenuHeader=Fichier and firstMenuHeader=ファイル.

Download

System Bundle
Windows x64 5do-1.9.1-win-x64.zip
Windows arm64 5do-1.9.1-win-arm64.zip
Linux x64 5do-1.9.1-linux-x64.tar.gz
Linux arm64 5do-1.9.1-linux-arm64.tar.gz
macOS x64 5do-1.9.1-osx-x64.dmg
macOS arm64 5do-1.9.1-osx-arm64.dmg

Install the .NET 11 Runtime first; the bundles do not include it. See the release page for SHA256SUMS.txt.

5DO is donationware: non-commercial, source-available software under the FreeDO modified GNU LGPL. No BIOS ROMs or game images are distributed. "3DO" and "Panasonic" are trademarks of their respective owners; 5DO is not affiliated with or endorsed by them.

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