Every page of the site is offered in every declared language, derived from the English and held to it in a browser

majordomus://rule/project.the-site-is-offered-in-every-language@1active sitelanguagelinkslayouttesting

it references

depends_on project.derived-once@1
depends_on project.english-only@4
depends_on project.every-link-and-control-is-tested@1

referenced by

Nothing in the layer names it. Backlinks are derived, so an empty list is an answer rather than an omission.

Rationale

On 2026-10-19 the owner ordered the site to be always fully multilingual, Czech and English at the least, derived and translated automatically, and never maintained twice (ADR 0218). The first Czech copy was published with its top bar wrapped onto a second line at 1280 px: the Czech labels were longer than the English ones, and a row of buttons had been translated as one sentence. Nothing measured the copy against its original, so nothing refused it. A copy derived by a machine is held by a machine, or it is not held.

Required behaviour

Every page the site builds is copied into every declared language by scripts/site-build; no page of another language is written by hand, except the authored pages project.english-only declares, which are carried unchanged and named canonical by their copies.
In every copy, every link lands on a file the build wrote, and a link to a page that has a copy in that language leads to that copy.
The switch names every declared language, leads to each copy and marks the one being read; the alternates name every copy, and each names this page back.
At every width the design declares, the top bar of a copy has the height and the rows of the English page's bar, and nothing in it overflows.

Failure behaviour

The site-languages gate (scripts/lib/site-i18n-probe.mjs) fails the change and names the page, the kind of finding and what it measured. A translation that would break the bar is fixed in the translation memory, never by excluding the page or the width.

Verification

scripts/lib/site-i18n-probe.mjs loads every page of every copy in Chromium, answered from the build itself with no network, and holds each to the four requirements above. test/cases/3590_the_site_is_derived_in_every_language.sh proves the pass that writes the copies: translated segments, restored placeholders, rewritten links, refused translations, the switch, the notice, the canonical URL and a second pass that changes nothing.

Where this comes from

canonical file: .ai/repo/rules/project/the-site-is-offered-in-every-language.v1.md
identity: project.the-site-is-offered-in-every-language@1
also served as: MCP resource majordomus://rule/project.the-site-is-offered-in-every-language@1 · majordomus entity show rule/project-the-site-is-offered-in-every-language-1 · GET /api/v1/entity?uri=majordomus://rule/project.the-site-is-offered-in-every-language@1
in the Cockpit: /cockpit/objects/rule/project-the-site-is-offered-in-every-language-1

This page is generated from the file above by scripts/generate-site-data; editing the page changes nothing, editing the file changes every surface. The relations above are edges of docs/generated/graph.json, which the executable writes from the same index.