How do I change the text: Click on Event Name for description/registration

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You didn’t provide a link to the plugin but I guess you mean this one.

I wonder if you mean:

  • line #20 in the file /public/evr_public-show_event_list.php:

    echo '<caption>'.__('Click on Event Name for description/registration','evr_language').'</caption>';

  • line #338 in the file evr_content.php:

    <b>Click on Event Name for description/registration</b>

You could use the gettext filter to change the former, but you should report the latter one to the plugin author and ask for a proper localization of that text.