Hi Zack,
Unfortuntately we cannot add specific JavaScript to individual sites for security reasons.
However, we are in the process of creating a tool that will allow your site to support multiple languages and give your community the ability to help translate content. This tool will be available for [http://static1.squarespace.com/static/53a0a8bde4b0d80b1aca0147/t/53e90019e4b05aa5dfe1cd7e/1407778841276/Dozuki-Open-Source-Feature-list.pdf|paid sites].
Best Wishes,
Megan