How to render language select block in page template? Background information:
I used the following script to list all the twig blocks: drush ev "print_r(array_keys(\Drupal::service('plugin.manager.block')->getDefinitions()))" and when I tried the following twig : {{ drupal_entity('block', '') }} and it is not rendering the twig block–

I developed a Twig page in Drupal 8 to allow my website visitors the ability to select the language they want. I downloaded all the multilingual contrib modules.

I am facing two issues:


How to render a block in the middle of my twig page to display the language drop-down menu? (I already have a block that displays a drop-down menu language from a contrib module). 
The CSS background image I had setup is covering one of the Twig field I wanted to test. How can I tweak the CSS in order to display the twig block?
drupal_entity() is for rendering entities. For rendering block plugins use drupal_block() instead.
The difference is explained very well in the following guide.
https://www.drupal.org/docs/8/modules/twig-tweak/rendering-blocks-with-twig-tweak