There is a book of poetry by Adrienne Rich called The Dream of a Common Language, and a book by Christopher Davies called Divided by a Common Language: A Guide to British and American English.
book of language
The language of the common people was called vernacular. It was the everyday language spoken by ordinary people in a particular region or country, as opposed to the formal or literary language.
They are called "linguistic or language communities."
There is no language called "African". Africa is a huge continent with many languages. There is a language called Afrikaans, perhaps that is what you mean?
Its called Mandarin
The last holy book Qur'an is revealed in Arabic language.
Detective stories is common.
Yes.
When authors write in the common language spoken by the general population, it is called "vernacular writing." This style captures the everyday language and dialect of a particular region or group, making the text more relatable and accessible to a wider audience.
The language common to both Iran and Afghanistan is Persian (or Farsi)
It depends on the computer, most common is binary code.
Japan is called Nippon or Nihon in its native language. Nihon is much more common.