Pseudocode-i18n for Visual Studio Code

Write, run, check, format and visualize multilingual pseudocode directly in Visual Studio Code / Code - OSS.

Current version: 1.0.2. Documentation: https://rod2ik.gitlab.io/vscode-pseudocode-i18n/

Quick start — 5 minutes

1. Install Pseudocode-i18n from Visual Studio Marketplace or Open VSX.
2. Make sure Python 3.11 or newer is available on the computer.
3. Create hello.pseudo (or hello.algo).
4. Paste this example:

# language: fr

Saisir n
cible = entalea(1, n)

Tant Que Vrai:
    Saisir m
    Si m > cible Alors:
        Afficher "Trop grand !"
    Sinon Si m < cible Alors:
        Afficher "Trop petit !"
    Sinon:
        Afficher "Gagné !"
        Sortir
    Fin
Fin

5. Press F5 to run the file.
6. Press Ctrl+K V to open the Pseudocode panel and try Diagnostics, Step-by-step execution, Documentation, Flowchart and Information.
7. In Flowchart, switch between Mermaid and Graphviz and choose the text size that is comfortable for you.

The language directive is optional: the extension can also use project configuration or automatic language detection. Accepted directive forms include # language: fr, # language fr, # lang: fr and # lang fr.

Requirements and dependencies

• Visual Studio Code / Code - OSS: compatible with VS Code ^1.90.0.
• Python: 3.11 or newer must be available on the host; Python is not bundled.
• Runtime projects: pseudocode-i18n >= 1.0.2, < 1.1 and pseudocode-i18n-languageserver >=1.0.2,<1.1.
• The extension creates and maintains its own private Python runtime and installs the coordinated core/LSP automatically. Users do not install the sibling projects manually.
• Mermaid and Graphviz support is managed by that private runtime through mermaidx and PyGraphviz. No manual mmdc, npx, dot, neato or system Graphviz installation is required for normal extension use.

What you can do

Both .pseudo and .algo are first-class Pseudocode files.

Multilingual pseudocode

The same language features are available in 14 source languages. Diagnostics, snippets, documentation, Tutor labels and flowchart labels follow the detected Pseudocode source language, independently from the VS Code interface language.

Français	Español
Italiano	Português
Deutsch	Nederlands
Dansk	Svenska
Norsk	Suomi
Ελληνικά	Українська
Русский	English

Flowcharts and step-by-step execution

The extension can render the same algorithm as Mermaid or Graphviz. Conditions use diamonds, input/output uses parallelograms, and loop bodies keep the stable vertical layout defined by the shared core. Nested loops keep that layout recursively.

The Flowchart and Tutor views share the same program model, so the highlighted execution step matches the static algorigram.

Français	Español
Italiano	Português
Deutsch	Nederlands
Dansk	Svenska
Norsk	Suomi
Ελληνικά	Українська
Русский	English

Installation

For normal use, install the extension from Visual Studio Marketplace or Open VSX. A local .vsix can also be installed manually when needed.

See the installation guide for runtime setup, first-start behavior and VSIX installation.

Help and troubleshooting

The user documentation contains:

• a Quick start;
• a task-oriented “I want to…” guide;
• a Troubleshooting guide;
• complete language-specific syntax and examples for all 14 languages;
• command, settings and compatibility references.

Development

Contributor setup, architecture, grammar generation, testing, documentation generation and publishing are intentionally kept in the dedicated Development documentation, not in the user guide.

Ecosystem

License

See the repository license for redistribution and contribution terms.