As of right now, there is no way to have translatable strings in Nanoflows and Microflows.
The only way to achieve this is by using the ENUMs. Using ENUMs leads to clutter either because of too many ENUMs, or too many elements in ENUM.
I believe it would be beneficial to the development speed if there was a way to get the translated text right in the micro/nanoflow. Exactly like it work with translated text template in Validation feedback and Show message actions.
To my surprise java action templates do not work the same way. Simply giving us ability to have the java template translated would already be a huge help since we could return the text from it and provide to other actions.
However having a translatable string as a variable would be ideal. Such string could be used in a lot of various JS actions which require user action, or understanding of message, for example, snack bar, or confirmation prompt.