Visitors should not have to read English to register a name. The pages
stay authored in English; js/i18n.js picks the language from the saved
choice, ?lang=, or the browser, fetches i18n/<lang>.json (exact English
text -> translation) and rewrites text nodes, placeholders, titles and the
page title. A MutationObserver keeps script-built content (search rows,
register modal, portal rows, footer, profile menu) translated, so no page
script had to change. A dropdown in the top nav switches languages and
back to English losslessly. Code, hashes, addresses and record keys are
never touched. Ships German, Greek, Russian, Spanish, French and
Portuguese; the docs page keeps its English prose and only gains the
translated chrome.
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