利用可能なソリューション

Problem:
String Translation - domain is missing from the list when using HAML
Solution:
The 4.0.7 version is an older version and since then there have been plenty of changes made to our code.

As WPML itself does not scan or officially support HAML files I wouldn't be able to point out what change was made that could have caused this behavior with HAML files.

One of the functions that scan the templates has changed. It's possible the new function does not scan non-PHP files

Line 31 of wpml-string-translation\classes\strings-scanning\wpml-st-theme-plugin-scan-dir-ajax.php will allow .haml files to be scanned by changing:

$file_type = array( 'php', 'inc' );

to

$file_type = array( 'php', 'inc', 'haml' );

However, I tried this and it doesn't catch the strings in Haml.

You might want to examine the following file which should be where all the actual processing is happening:
wpml-string-translation\inc\potx.php

NOTE: I did test with version 4.0.7 of WPML and its version at the time of String Translation and it still does not scan HAML files.

Once you go to WPML->Themes and Plugins localization-> Scan your theme and then you get a list of all the files scanned, only .php files are scanned.

My suggestion would be to create a .mo file with your strings
https://wordpress.stackexchange.com/questions/127917/generating-po-mo-translating-files-from-scratch-in-a-wordpress-theme
Relevant Documentation:

Problem:
Half of the products has featured images, the other half has not.

Solution:
1. Make sure you have marked both options for media attachments on your original product: 'Duplicate uploaded media to translations' and 'Duplicate featured images'. Then try saving and updating your original and translated product.

2. You can use Media translation plugin and in WPML>Settings>Media translations and try to sync images.
- You need to make sure you click the 'Start' button

Relevant Documentation:
https://wpml.org/documentation/getting-started-guide/media-translation/#media-translation-settings

Problem: We are getting this error:
Error log is showing the following:
PHP Fatal error: Uncaught InvalidArgumentException: element_id and type do not match for element_id:7283 the database contains post_page while this function was called with post_attachment in xxxx/content/plugins/sitepress-multilingual-cms/classes/core-abstract-classes/class-wpml-set-language.php:32\nStack trace:\n#0 xxxx/content/plugins/sitepress-multilingual-cms/sitepress.class.php(1497): WPML_Set_Language->set('7283', 'post_attachment', false, 'en', NULL, true)\n#1 xxxx/content/plugins/sitepress-multilingual-cms/classes/media/duplication/class-wpml-media-attachments-duplication.php(1016): SitePress->set_element_language_details('7283', 'post_attachment', false, 'en')\n#2 xxxx/wordpress/wp-includes/class-wp-hook.php(286): WPML_Media_Attachments_Duplication->batch_set_initial_language('')\n#3 xxxx/wordpress/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters('', Array)\n#4 xxxx/wordpress/ in xxxx/content/plugins/sitepress-multilingual-cms/classes/core-abstract-classes/class-wpml-set-language.php on line 32, referer

Solution: In this case the fastest way to solve the issue is by following this steps:
- Create a full backup of the site.
- Connect to the database -> in the wp_posts table delete the row with element ID = 7283
- Double check if the issue persists.
- Repeat this process if the error message appears again with another ID.

Note: Please don't forget to create a full backup of the site because if something goes wrong you will have to restore it.

Relevant Documentation: