Agglutination, the joining of parts of words to form new ones.
Creole, a language constructed from two or more languages as a result of extended contact between communities (one usually European). A creole is a mother tongue of one community.
Diphthong, a vowel sound, occupying a single syllable, during the articulation of which the tongue moves from one position to another, causing a continual change in vowel quality, as in the pronunciation of a in English late, during which the tongue moves from the position of (e) towards (i)
Inflection, variations or changes that words undergo to indicate their relations with other words and changes in meaning.
Intonation or tonality, a system of pitch variations used to indicate differences in meaning between words otherwise similar in sound. Tonal languages give words a distinctive relative pitch (high or low), or a distinctive pitch change (level, rising, or falling).
Pidgin, a language that has been constructed from two or more shared languages for communication between communities. A pidgin is not a mother tongue.
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