Instead of using I18n for the field texts and forcing the
locale (e.g. `I18n.t('seeds...', locale: :es)`), I'm moving
content out of `config/locales/` and into the seed file.
This is because this content is less about reacting to different
locales (the locale would always be forced so we don't actually
use the main i18n functionality), and more about demonstrating
the "translatable fields" feature.
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