Using URI Language Identifier

Hello!

Currently I'm trying to add multi language support for my website.
I stumbled upon this URI Language Identifier, which seems to work great and adds the needed language abbreviations to the URI, which seems to be a good idea for SEO.

But I've encountered the following problem:

Let's say the website's main language is english and secondary language is german.
The websites URI looks like this - www.example.com/en or www.example.com/de

Is it possible for the default language to remove the language abbreviations from the URI, so I would get www.example.com for my main language and www.example.com/de for my secondary language?

Or perhaps anyone could suggest a better library for this?

Any input is greatly appreciated.