The Lebanese language, in its current form, is only a spoken language.
However, if you are interested in learning a language that allows you to communicate with people in Lebanon, you should know that speaking Arabic in Beirut.
Lebanese people have adopted Arabic as their written language.
Despite the common misconception that Lebanese is a form of the Arabic language, the Lebanese language has evolved from its original Aramaic form to a language highly differentiated from the Arabic language.
The Lebanese language, in its current form, is only a spoken language