KnpPaginatorBundle Translation

Make the following directory :

{YourSymfonydirectory}/vendor/knplabs/knp-paginator-bundle/Knp/Bundle/PaginatorBundle/Resources/translations

For French language, make the file:

messages.fr.xliff

There are other possible formats, but as said by Symfony founders  :

This “dictionary” of translations can be created in several different formats, XLIFF being the recommended format

So add this content if you want a French translation in the proper way :

<?xml version="1.0"?>
<xliff version="1.2" xmlns="urn:oasis:names:tc:xliff:document:1.2">
    <file source-language="en" datatype="plaintext" original="file.ext">
        <body>
            <trans-unit id="1">
                <source>Next</source>
                <target>Suivant</target>
            </trans-unit>
            <trans-unit id="2">
                <source>Previous</source>
                <target>Précédent</target>
            </trans-unit>
         </body>
    </file>
</xliff>

Read more about translating in Symfony :
http://symfony.com/doc/current/book/translation.html