title: BotFramework-WebChat - dynamically change language
body: <p>I am using BotFramework-WebChat in multilingual site, where I want to set bot locale on language change which I select from dropdown, can any one guide me for implementing this.</p>
  
  <p>Even after passing changes local it stays with initial set locale, I am using it in Angular 4.</p>
  
  <pre><code> ngAfterViewInit() {
      BotChat.App({
        directLine: {
          secret: '',
          webSocket: false
        },
        user: {
          id: 'userid',
          name: 'me',
        },
        bot: {
          id: 'botid',
          name: 'bot'
        },
        resize: 'detect',
        formatOptions:
        {
        showHeader: true
        },
        locale: this.translate.currentLang
      }, document.getElementById("bot"));
      console.log(this.translate.currentLang)
  
    }
  </code></pre>
  
  <p>Language change is working fine for site but how to change language of chat control?</p>