title: Rails 5 - single field (text / string) with multiple "versions" dep. on language key
body: <p>In my app, I have the following case, that I am wondering how to resolve in Rails 5.</p>
  
  <p>In the field <code>document_keywords</code> of the model <code>documenttype</code> I store keywords used to classify a document. In effect, the language is an attribute to the field <code>document_keywords</code> (much like a currency is an attribute to an amount field). Note: the number of to be supported languages is variable.</p>
  
  <p><strong>Example</strong></p>
  
  <p>These keywords all belong to the same document type</p>
  
  <p>Document type: Purchase Order</p>
  
  <p>Language: "EN" keywords: "Purchase Order" "Customer Order"</p>
  
  <p>Language: "FR" keywords: "Bon de commande"</p>
  
  <p>Language: "NL" keywords: "bestelling" "bestelbrief"</p>
  
  <p>How should I do this? All help / tips / suggestions much appreciated!</p>
  
  <p>Looks to me like i8n is not the solution here.</p>