All the strings with the plugin are fully translatable. If you would like to translate the plugin into your own language or provide an alternative spelling or wording, such as changing ‘Create Subscription’ to ‘Create Notification’, you can do this using the free Loco Translate plugin.
Just make sure that your translations are stored in the ‘wp-content/languages’ folder in order for the plugin to pick them up correctly. Loco Translate usually stores plugin translations in the ‘wp-content/languages/loco/plugins’ folder.