title: String translation with dynamic text and inputs
body: <p>I am working on front-end only React application and will soon be implementing internationalization. We only need one additional language... at this point. I would like to do it in a way that is maintainable, where adding a new language would be ideally as close as possible to merely providing a new config object with translations for various strings.</p>
  
  <p>The issue I know we will have, is that we have dynamic inputs inside of sentences as demonstrated below (where [] are inputs and ** is dynamically changing data). This is just an example sentence... lots of other similar type things elsewhere in the app.</p>
  
  <p><code>I am [23] years old. I was born in [ ______▾]. In 2055 I would be *65* years old</code>. </p>
  
  <p>We could break out 'I am', '*age input', 'years old. I was born in', '*year dropdown'. etc. But depending on the language, word order could be changed or an input could be at the beginning of a sentence etc, and I feel like doing it in that way would make for a really weird looking and hard to maintain language file.</p>
  
  <p>I'm looking to know if there are common patterns and/or libraries we can use to help with this challenge.</p>