Basic english vs business english

In general, though, to speak business English well, you need to develop confidence.
Try practicing in front of a mirror, or get a study partner to practice your English speaking with.
As a student of business English, you will eventually need to learn and master both the written and spoken forms of the language.

Another simple difference between Business English and general English is that the former is mostly formal language while the latter English is mostly informal language.
When you are requesting something….
GE:

While there will be some overlapping between the two in terms of topics and vocabulary, business English goes much further

Business English takes your existing language skills and develops them in a more focused and direct way

The aim is to allow you to interact and communicate freely with English-speaking countries and companies