[Resolved] In the Enfold theme, a certain type of string is not being translated properly.

Background of the issue:
I am trying to translate the Fold/Unfold text in the Enfold theme, which I have set up in Dutch. However, I can't find the translation in WPML, neither in the page translation menu nor in the theme settings. I have used some custom code inside the functions.php to translate it, but it has a small delay. Please see this link for the thread on Enfold: hidden link and the issue can be seen here: hidden link

Symptoms:
The 'Lees meer' button is not being translated properly. I expected a proper translation field when translating the page with the (classic) translation editor, but instead, I got a non-translated Read more text.

Questions:
Why can't I find the translation for the Fold/Unfold in Enfold Text Block in text in WPML?
How can I ensure WPML handles the translation properly without delay?