Login/out information based on language

Hey, I’m looking for a way to translate php generated text, based on the selected language.

I want this code to show login/logout information to user in his langauge.

Can you help me?

<!-- START DK-->
<?php
  // If user is logged in and the language is DK, echo in DK / EN
  if (is_user_logged_in() . icl_laguage=='dk'){
      echo "Velkommen, "; // Echo in DK / EN

  // Get user information
  global $current_user;
        get_currentuserinfo();

        echo $current_user->user_firstname . "\n"; // Get first name
        echo '<a href="https://skipthedanish.com/da/min-konto" title="Se din kontoinformation">Konto</a>'; // Echo in DK / EN
        echo '<a href="'. wp_logout_url( home_url() ) .'">Log ud</a>'; // Echo in DK / EN

  // If user is not logged in, echo in DK / EN
  } else {
      echo 'Er du en tidligere kunde? ' . '<a href="https://skipthedanish.com/my-account" title="Log ind i din kundekonto">Log ind</a>'; //  Echo in DK / EN
  };
?>
<!-- END DK-->