This thread is resolved. Here is a description of the problem and solution.
Problem: In every English property page, there is a gallery of photos. In the Italian property pages are showing only the main photo but not the rest of the photos in the galleries.
Solution: - Go to WPML-> Settings -> Media Translation. - For old content, check that following options are check and press Start button. This would create link to images for other languages for previous contents. X Translate existing media in all languages X Duplicate existing media for translated content X Duplicate the featured images for translated content - Click on the Start button.
Relevant Documentation: https://wpml.org/documentation/getting-started-guide/media-translation/
This is the technical support forum for WPML - the multilingual WordPress plugin.