8 most difficult countries to gain citizenship

Kuwait

According to the Nationality Law of 1999, after living in Kuwait for 20 years (15 for citizens of other Arab countries), you can apply to be granted Kuwaiti citizenship, but only if you are Muslim by birth or conversion. If you converted, you must have been practicing for five years. You must also speak Arabic fluently.The Nationality Law also states that the wife of a Kuwaiti man can ask to become a citizen after being married for 15 years.