Calling variables, dynamically I've got a parent template which contains the following code:

{% include '_layout' with {'countryCode': 'au'} %}


I have a global set with the handle au_Variables, and within that a field with the handle vimeoVideoId_au

The problem I'm having is with trying to render the following global: {{ au_Variables.vimeoVideoId_au }} dynamically, using the countryCode.

I've tried 

{% set videoId = countryCode~'_Variables.vimeoVideoId_'~countryCode %}


And then outputting {{ videoId }} but all I get is the string au_Variables.vimeoVideoId_au, not the rendered global.

Any ideas how to do this in Twig?
Not sure if you saw this, but you may also be able to use the Twig attribute function:

{{ attribute(array, item) }}


Pretty straightforward, here's the official docs page...