Here is how to Internationalize the Peregrine LeaderBoard Plugin.
create a file if it doesn't exist called config/locale.php or just add the definitions to your config/locale.php if it exists.
cut and paste the following in it.
<?php if (!defined('APPLICATION')) exit(); $Definition['Points: '] = 'Points: '; $Definition['Top Leaders'] = 'Top Leaders';
e.g. changing the right hand side of the equation will change the Title of the panel and the Points.
$Definition['Points: '] = 'My Points: '; $Definition['Top Leaders'] = 'My Top Leaders';
I may not provide the completed solution you might desire, but I do try to provide honest suggestions to help you solve your issue.