The plugin uses Javascript to hide long comments (Amazon-style comments).
Truncate Comments is a plugin that hides a part of a long comment under a “Read more” link that, when clicked, reveals the hidden part of the comment. The plugin provides the functionality of Amazon.com comments.
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The plugin uses jQuery Collapser by Aakash Chakravarthy.
Plugin settings are available in «Settings\Truncate Comments».
Add the following code to the style.css file of your theme.
.commentMoreLink { color:red!important; }
The link will become red (just an example).
Yes, please use translate.wordpress.org.