I found several I18N issues, and I cannot find this plugin’s GitHub repository, so I cannot submit PR to you.

All the following modification are based on version 1.0.

mysql-process-list.php, line 20

wp_die(__('You do not have sufficient permissions to access this page.', 'mysql-process-list' ));

Line 24 to 25

<h1><?php esc_html_e( 'MySQL Process List', 'mysql-process-list' ); ?></h1>
<p><?php esc_html_e( 'The MySQL process list indicates the operations currently being performed by the set of threads executing within the website.', 'mysql-process-list' ); ?></p>

Line 29 to 35

<option value="5"><?php esc_html_e( '5 seconds', 'mysql-process-list' ); ?></option>
<option value="10" selected><?php esc_html_e( '10 seconds', 'mysql-process-list' ); ?></option>
<option value="30"><?php esc_html_e( '30 seconds', 'mysql-process-list' ); ?></option>
<option value="60"><?php esc_html_e( '60 seconds', 'mysql-process-list' ); ?></option>
<option value="120"><?php esc_html_e( '2 minutes', 'mysql-process-list' ); ?></option>
<option value="300"><?php esc_html_e( '5 minutes', 'mysql-process-list' ); ?></option>
<option value="600"><?php esc_html_e( '10 minutes', 'mysql-process-list' ); ?></option>

Line 41 to 48

<th><?php esc_html_e( 'ID', 'mysql-process-list' ); ?></th>
<th><?php esc_html_e( 'User', 'mysql-process-list' ); ?></th>
<th><?php esc_html_e( 'Host', 'mysql-process-list' ); ?></th>
<th><?php esc_html_e( 'DB', 'mysql-process-list' ); ?></th>
<th><?php esc_html_e( 'Command', 'mysql-process-list' ); ?></th>
<th><?php esc_html_e( 'Time', 'mysql-process-list' ); ?></th>
<th><?php esc_html_e( 'State', 'mysql-process-list' ); ?></th>
<th><?php esc_html_e( 'Info', 'mysql-process-list' ); ?></th>