Background of the issue:
Our website was originally developed by an agency with whom we are no longer working. I'm currently investigating our theme to determine if we are using Twig. I explored the theme to check for a template folder structured as my-theme/wpml/templates/currency-switchers/my-template, as described in your documentation article 'Designing Custom Currency Switchers Using Template Files'.
Symptoms:
I did not find any such template folder, nor did I find any *.twig files within the theme.
Questions:
Is the absence of a template folder and *.twig files sufficient evidence to confirm that we do not use Twig on our website?