Comment by Mario Giambanco on "How do we set up the directory structure for a multilingual site without duplicating content?"

Which language / framework if any?

[updated]

Your going to need some kind of framework - even if it's as simple as JQuery - http://i18next.com/docs/ecosystem/

Then - follow the sample here: http://i18next.com/translate/context/

{
  "debug": true,
  "lng": "en",
  "fallbackLng": "en",
  "backend": {
    "loadPath": "locales/{{lng}}/{{ns}}.json"
  }
}

So put your translation files in the loadPath structure - then theres no duplication of content. Using a framework, you'll replace the text in the selectors and the i18next code will take care of replacing the strings.

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