There are lots of bits and pieces floating around the various forums, including this one and Stack Overflow, on handling URLs for multilingual sites. However, localization has a lot more to it - dealing with date formats, dealing with right-to-left rendering, seamlessly switching between locales, having a convenient way to export language files for translators, etc.
Although there are several projects on github that address these issues to varying degrees, I think it would be great to see a Laracasts series on localization (using Laravel 5) that brings all these things together and presents a complete solution to localization. Admittedly not a small undertaking, but I'm sure Jeffrey is up for it! :-)
Please drop a comment below if you would be interested in this series.