📖 [Docs]: American English established as the project dialect

[Marius Storhaug (MariusStorhaug)]

The natural-language standard now names American English as the MSX project dialect and identifies it with the en-US locale.

Changed: Project dialect terminology

Documentation authors and agents now see “American English” consistently in the standard, its generated index entry, and its prompt example. Existing spelling and vocabulary requirements remain unchanged.

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Technical details

• Updated src/docs/Coding-Standards/Natural-Language.md and regenerated src/docs/Coding-Standards/index.md.
• Implementation plan progress: every task in Standardize natural language on American English #177 is complete.
• Local validation: both documentation link checks pass, and all 95 Pester tests pass.
• CI: lint, build, and both link checks pass. The test job is blocked before test execution because PSGallery is unavailable on the runner; Register PSGallery before installing Pester in CI #179 tracks that infrastructure defect.
• Copilot review completed with no inline feedback.

Changed surface	Standards checked	Framework docs checked	Result
src/docs/Coding-Standards/**	Natural Language, Markdown	Documentation Model	Aligned

Relevant issues (or links)

• Resolves Standardize natural language on American English #177

Related work

• Depends on Register PSGallery before installing Pester in CI #179

[Copilot]

Pull request overview

Updates the Natural Language coding standard to explicitly name American English as the MSX project dialect and to identify it with the en-US locale, keeping the wording consistent across the standard and its generated index entry.

Changes:

• Renamed “US English” terminology to “American English” in the Natural Language standard and its examples.
• Added the explicit locale identifier en-US to the dialect statement.
• Updated the generated Coding Standards index entry to match the new wording.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
src/docs/Coding-Standards/Natural-Language.md	Replaces “US English” references with “American English” and adds en-US for clarity, including the prompt example.
src/docs/Coding-Standards/index.md	Updates the generated index row description to match the Natural Language standard’s new dialect wording.

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