CodingFabian

Because WPML creates posts and pages for each language, comments from one do not appear on the other. 
This plugin merges comments from all WPML translations of the posts and pages, so that they all are displayed on each other. 
Comments are internally still attached to the post or page they were made on.
It uses the <code>get_comments()</code> api call, which in some circumstances might not return all posts.

WPML comment merging

This plugin merges comments from all WPML translations of the posts and pages, so that they all are displayed on each other.

TIV.NET INC.

Gregory Karpinsky (@tivnet)

Alex Gor

WPGlobus Featured Images is an extension to the WPGlobus plugin. It allows setting featured images separately for each language.
<blockquote>
NOTE: You need to install and activate the <a href="https://wordpress.org/plugins/wpglobus/" rel="ugc">WPGlobus Multilingual Plugin</a> before installing the WPGlobus Featured Images extension.
</blockquote>
<h4>More info</h4>
<ul>
<li><a href="https://wpglobus.com/add-ons/featured-images/" rel="nofollow ugc">WPGlobus Featured Images home page</a>.</li>
<li><a href="https://github.com/WPGlobus/wpglobus-featured-images" rel="nofollow ugc">GitHub code repository</a>.</li>
</ul>

WPGlobus Featured Images

WPGlobus Featured Images is an extension to the WPGlobus plugin. It allows setting featured images separately for each language.

WPML comment merging vs WPGlobus Featured Images