The International Phonetic Alphabet (IPA) is an alphabetic system of phonetic notation based primarily on the Latin alphabet. It was devised by the International Phonetic Association as a standardized representation of the sounds of spoken language. The IPA is used by foreign language students and teachers, linguists, Speech-Language Pathologists, singers, actors, lexicographers, constructed language creators (conlangers), and translators.

The IPA is designed to represent only those qualities of speech that are distinctive in spoken language: phonemes, intonation, and the separation of words and syllables. To represent additional qualities of speech such as tooth gnashing, lisping, and sounds made with a cleft palate, an extended set of symbols called the Extensions to the IPA may be used.

IPA symbols are composed of one or more elements of two basic types, letters and diacritics. For example, the sound of the English letter ⟨t⟩ may be transcribed in IPA with a single letter, [t], or with a letter plus diacritics, [t̺ʰ], depending on how precise one wishes to be. Often, slashes are used to signal broad or phonemic transcription; thus, /t/ is less specific than, and could refer to, either [t̺ʰ] or [t] depending on the context and language.

Arabic (العربية al-ʻarabīyah or عربي/عربى ʿarabī) is a name applied to the descendants of the Classical Arabic language of the 6th century CE. This includes both the literary language (Modern Standard Arabic or Literary Arabic, used in most written documents as well as in formal spoken occasions, such as lectures and radio broadcasts) and the spoken Arabic varieties, spoken in a wide arc of territory stretching across the Middle East and North Africa. Arabic is a Central Semitic language, most closely related to Hebrew, Aramaic, Ugaritic and Phoenician. Written Arabic is distinct from and more conservative than all of the spoken varieties, and the two exist in a state known as diglossia, used side-by-side for different societal functions.

Some of the spoken varieties are mutually unintelligible, and the varieties as a whole constitute a sociolinguistic language. This means that on purely linguistic grounds they would likely be considered to constitute more than one language, but are commonly grouped together as a single language for political and/or ethnic reasons. If considered multiple languages, it is unclear how many languages there would be, as the spoken varieties form a dialect chain with no clear boundaries. If Arabic is considered a single language, it counts more than 300 million first language speakers (according to some estimates, as high as 340 million), more than that of any other Semitic language. If considered separate languages, the most-spoken variety would most likely be Egyptian Arabic, with more than 50 million native speakers — still greater than any other Semitic language.