"Global: Custom text" field translation Is it possible to translate this type of view field, Or use t() in this field for single words?
I'm using the Internationalization and the Internationalization Views modules, but I can't translate these fields.
In Drupal 8 and 9, use t ( or trans) filter in twig element in your Global: Custom text”.
for example, create a Global: custom text field and paste
 {{ 'this text will be available in translate interface'|t }}

Ref for reading more: https://www.drupal.org/docs/theming-drupal/twig-in-drupal/filters-modifying-variables-in-twig-templates