I stopped hardcoding locales, and adding a language became a one-line change

Most i18n tutorials stop at "put your strings in a JSON file". That covers labels. It does not cover the thing that actually breaks: URLs.

I run a personality test site in five locales (French, English, Brazilian Portuguese, European Portuguese, Spanish). Same site, five language trees, roughly 96 articles each. The first version had the shape every project seems to grow by accident:

$prefix = $locale === 'en' ? '/en' : '';

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