Write the module's own prose in American English

This project writes American English. In 47 files it does not, in 80 places:

• cancelling, 53 times, across the engine, the payment, VBO and UI submodules and their tests;
• honour, honoured and honours, 19 times, most of them new in this release cycle;
• modelled and modelling, 6 times;
• favour, twice.

Nineteen of them sit on the documented API surface: OrchestraClientInterface::start() and WireAccount both describe a name being honoured, and docs/distributed.md and docs/subprocesses.md carry it into the published documentation. One is a string a person reads, Cancelling selected instances, the batch title on the instance listing, so the French catalog moves with it.

Why the lint lane does not catch it

The cspell job is green on 1.x and stays green. Its en-US dictionary accepts both forms of these four words, so the lane that enforces spelling cannot see the forms this module actually uses. That is why they accumulated.

Proposed resolution

Sweep all 80, and move the one translated string's French entry with it. No test comes with this: tests are for code logic, and the tests that read source files to assert things about the words in them are removed in #3624520: Drop the tests that scan source files instead of exercising code, and retranslate two French strings. A spelling problem is fixed in the spelling.

AI-Generated: Yes (Claude Code was used to help draft this issue summary and to write the code on the merge request. I reviewed and ran the work myself before posting it.)