Sync translations

[victorlin]

Description of proposed changes

scripts/diff-lang.js will check translation coverage of languages against src/locales/en, however src/locales/en has fallen out of sync with the source code. I've added a new test to uncover what is out of sync (52 errors) and will address them in this PR since they are now exposed as failing tests in CI.

Related issue(s)

Closes #1960

Checklist

• Checks pass
• If making user-facing changes, add a message in CHANGELOG.md summarizing the changes in this PR
• (to be done by a Nextstrain team member) Create preview PRs on downstream repositories.
• Update DEV_DOCS section on translation

[jameshadfield]

Briefly read through things as it popped up on my notifications. This is a good direction to head in tho!

[jameshadfield]

I haven't worked my way through translations.test.js yet, but what is it about the previous code in this commit that wasn't able to be picked up by traversing the AST?

[victorlin]

The translation test file traverses the AST to find instances of t() and the first argument passed to it. If the argument is a literal string, we can get the value simply through traversal. If the argument is a variable, traversal is insufficient to determine the value and some form of evaluation would be necessary. It may be possible, but seems like a fundamentally different approach so I haven't tried it.

[jameshadfield]

Makes sense - thanks!

[jameshadfield]

We use both...

auspice/src/components/tree/infoPanels/hover.js

Lines 53 to 54 in c4768dd

	const dateDescription = inferred ? 'Inferred Date' : 'Date';
	elements.push(<InfoLine name={t(dateDescription)+":"} value={date} key="date"/>);

auspice/src/components/tree/infoPanels/click.js

Lines 180 to 186 in c4768dd

	const dateDescription = isTerminal ?
	(inferred ? "Inferred collection date" : "Collection date") :
	"Inferred date"; // hardcoded assumption that internal nodes are inferred
	return (
	<>
	{item(t(dateDescription), date)}

I prefer the capitalised form (i.e. prefer the style of the hover code over the click code).

[victorlin]

Oh thanks, not sure how I missed that yesterday. I'll replace e69bec2 with a commit that swaps Inferred date to Inferred Date.