If some fields are not filled, default values are used as fallbacks. E.g. if a template is uploaded with a custom subject but body is left empty, then the custom subject field is used with the default e-mail body.
Adding custom translations
Custom translations can be added to change text in templates while preserving the default translations. Keeping the default translations is useful in case Voog adds or improves the translations, which then you can also use in your templates.
Remove comments from custom_translations.tpl.
Create new translation files for the languages you wish to add custom translations to. Name the file custom_translations_XX.tpl, where XX is the language code.
Follow the format of default translation files, which use JSON format, and add your custom translations.
In the templates, change the templates to use custom translations for every text you added custom translations to.