[Geschlossen] TRanslating strings which are not seen in WPML TRanslation Management

Background of the issue:
I am trying to translate filter items in the calendar as well as event categories and the phrase 'View Events Website' into Russian and Estonian on my website versteckter Link. I am using the Divi Events Calendar plugin, which is based on WP Event Calendar plugin. I have read the documentation from the Divi team and managed to translate some detail labels manually (Location, Price etc). However, the Divi Events Calendar author has no experience with WPML and suggested using Falang. I prefer WPML as I have translated several websites with it. You can check the page here versteckter Link to see the untranslated words. I have also provided a screenshot of the strings found by WPML: versteckter Link.

Symptoms:
Certain filter items, event categories (Языки for example) and event categories are not being detected by WPML for translation.

Questions:
Why are some filter items and event categories not seen by WPML for translation?
How can I make WPML detect and translate these missing strings?