* Definition of "speak": How fluent does someone need to be to count as "speaking" a language? Does casual understanding count?
* Official language status: Some countries have multiple official languages, so Arabic might be widely spoken but not the primary one.
* Regional variations: Arabic itself has many dialects, some more mutually intelligible than others.
However, we can identify some countries where Arabic is spoken by a significant portion of the population but is not an official language:
* Many countries in Africa: Arabic is spoken by large communities in countries like Chad, Sudan, Nigeria, and Somalia, often due to historical trade and migration.
* Parts of Europe: Arabic is spoken by significant communities in countries like France, Spain, and the UK due to immigration.
* Other regions: Arabic communities exist in many countries with significant Muslim populations, including India, Indonesia, and Malaysia.
To give you a more concrete answer, you would need to define your criteria for "speaking" and "official language status."