I was responsible for integrating the language toggle system and general bugfixes around this responsive site.
We received the files from a third-party that we outsourced this site to, rife with bugs and not set up for a french toggle. I implemented a simple multidimensional associative array with all the copy for the site in their respective nested array, and simply printed the content around the site based on url.
I was later required to hook a CMS up to the site, which I custom built as well.
They have since changed the site.