yes
for Shia Islam Iran and Iraq for sunni Islam Egypt and Saudi Arabia
islamiyat is a subject which is taught in Muslim countries.. it is actually the study of Islam and Quran. Save
Islam
There are 50 Muslim majority countries. Refer to question below.
Eastern orthodox is the main, with more than a little Islam
Buddhism is the predominant religion in the majority of southeast Asian countries and Islam is also widespread but only two countries have Catholicism as their main religion, the Philippines and East Timor.
The religion taught by Muhammad is called, Islam, which means submission to the will of God. A follower of Islam is a Muslim.
Nation of Islam (NOI) is different than main stream Islam. NOI is not considered belonging to Islam per God revelation of Quran by God to prophet Muhammad (PBUH). Refer to question below. NOI is located only in USA.However, if you mean countries where Muslims are in, then all countries of the world but with different percentages.
there are many in Islamic countries. for example Al-Azhar university of Egypt is main center for Sunni Islam and Qum in Iran is main center for Shia Islam.
Other than India (Hinduism), it could be Islam or possibly Buddhism.
Buddhism is the predominant religion in the majority of southeast Asian countries and Islam is also widespread but only two countries have Catholicism as their main religion, the Philippines and East Timor.
Islam is a religion and not a language. You can spell words in Arabic (the language is which the Kuran is taught), but not 'in Islam'