title: React-Native, create dynamic string related to i18n
body: <p>I'm using <a href="https://github.com/AlexanderZaytsev/react-native-i18n" rel="nofollow noreferrer"><code>react-native-i18n</code></a> to develop a multi-locale app. In some strings I have to put a dynamic string like:</p>
  
  <p><code>var str = 'Hello dear '+ user.name +', good morning!'</code></p>
  
  <p>I don't want to define two params in languages json files (due to makes my code dirty and some langs are different in motion) to have such code:</p>
  
  <p><code>var str = lang.t('hello')+ ' ' + user.name + lang.t('goodMorning')</code></p>
  
  <p>I need a syntax like what we have in <code>Java</code> and <code>C#</code>:</p>
  
  <p><strong><code>var str = string.format(lang.t('helloMorning'), user.name)</code></strong></p>
  
  <p>///////////////
  en.json:</p>
  
  <p><strong><code>{
     "helloMorning":"Hello dear %s, good morning!"
  }</code></strong></p>