Phrase

This plugin allows you to send page or post content to your Phrase projects, directly from within WordPress. Once translations are done, send them back to WordPress and easily publish multilingual sites.

Phrase Strings

Phrase WordPress Integration. Phrase is a translation management platform for software projects. You can collaborate on language file translation with …

Pieter Bos

This plugin combines comments from all translations of the posts and pages using WPML. Comments are internally still attached to the post or page in the language they were made on. 
Naturally the WPML plugin is required to run.
This is a fixed version of the no longer maintained WPML Comment Merging plugin: 
https://wordpress.or/plugins/wpml-comment-merging/ and https://github.com/JulioPotier/wpml-comments-merging
There are no Settings, it simply does what it says on the label.
This plugin was developed with the assistance of ChatGPT, an AI language model created by <a href="https://www.openai.com/" rel="nofollow ugc">OpenAI</a>.
If you are looking to show comments in all languages on your website with WPML installed, I highly recommend installing the Multilingual Comments WPML plugin.
I support this plugin exclusively through <a href="https://github.com/senlin/multilingual-comments-wpml/issues" rel="nofollow ugc">Github</a>. Therefore, if you have any questions, need help and/or want to make a feature request, please open an issue here. You can also browse through open and closed issues to find what you are looking for and perhaps even help others.
Thanks for your understanding and cooperation.
If you like the Multilingual Comments WPML plugin, please consider leaving a <a href="https://wordpress.org/support/view/plugin-reviews/multilingual-comments-wpml?rate=5#postform" rel="ugc">review</a>. Thanks!
Multilingual Comments WPML by <a href="https://so-wp.com/plugin/multilingual-comments-wpml" rel="nofollow ugc">Pieter Bos</a>.

Multilingual Comments WPML

This plugin combines comments from all translations of the posts and pages using WPML.

Phrase Strings vs Multilingual Comments WPML