[raverbashing]

As it's a B2B app, I don't think there's a pressing need to localize. It might be interesting though to keep things localizable (not only for I18N reasons - documentation and testing come to mind)

Now, what you should absolutely DO is make sure your system doesn't break with foreign names/data/locales

Locales to test: RTL locales (Arabic and Hebrew for the most part) and maybe Turkish (the infamous dotted capital I)

Names: Chinese, Japanese, Russian, Latin Extended (ñ, œ, ø, á, é, etc), even names in English can break stuff (O'Brian)

Dates: does it work with DD/MM/YY or YYYY-MM-DD and keeps consistent?