Arabic is spoken by 422 Millions of people across the word. There is a "classical" Arabic (MSA), which is used for formal documents or news broadcast. There are many dialects, some of them, not mutually intelligible.
The Written Arabic section consists of 2 main parts:
Levantine Arabic dialect spoken in the 100-200 km-wide Easten Meditareen coastal strip (Wikipedia)
It differs slightly from the Written Arabic (MSA: Modern Standard Arabic) used for official documents and medias.
Saudi Arabic is the dialect of Arabic spoken in Saudi Arabia. (Wikipedia)
This section consists of 2 parts: