Q:

I am using a package for my language but not everything is translated

I am using: http://www.magentocommerce.com/magento-connect/magento-core-modules-french-language-pack.html
for the translation of my website to french.  But the bottom menu is in english for some reason. 

Why?  And what can I do to change this? 

A:

The language packages found on the magentocommerce.com website are not always complete.  MOst of them are not.   
The first row of footer links come from a static block called footer_links.  You can edit that in Cms->Static blocks.   
The second row comes from layout files.  But the texts listed there should be available in the language files.  You can search for a text in the files and translate it.   
I can also recommend this extension for working with translations. 
Here is what it does:

collect texts from specified modules and generates a csv file for
each module. 
identifies the texts from a specified locale that have the same
translation as the key: "Customer","Customer".  Note: False positives
may occur. 
generates all the locale files for the selected modules in a specific
language, by collecting the texts from the module files and merging
with the already existing locale files. 

Just make sure you backup your language files before using the extension...just in case.