The vowel system is more elaborate than in other West African variants; Standard Liberian English distinguishes [i] from [ɪ], and [u] from [ʊ], and uses the diphthongs [aɪ], [aʊ], and [əɪ]. Vowels can be nasalised. The final vowel of happy is [ɛ]. It favours open syllables, usually omitting syllable-final [t], [d], or a fricative. The interdental fricatives [θ, ð] appear as [t, d] in syllable-initial position, and as [f, v] finally. The glottal fricative [h] is preserved, as is the voiceless labio-velar fricative [ʍ] (in such words as whit and which in contrast to voiced [w] in wit and wish. Affricates have lost their stop component, thus [tʃ] > [ʃ]. Between vowels, [t] may be flapped (>[ɾ]) as in North American English. Liquids are lost at the end of words or before consonants, making Standard Liberian English a non-rhotic dialect.
Kru Pidgin English is a moribund variety that was spoken historically by 'Krumen'. These were individuals, most often from the Klao and Grebo ethnic groups, who worked as sailors on ships along the West African coast and also as migrant workers and domestics in such British colonies as the Gold Coast (Ghana) and Nigeria. The 'Krumen' tradition dates back to the end of the eighteenth century. With the end of the British colonial presence in West Africa in the mid-twentieth century, however, the tradition came to an end, and with it the ongoing use of Kru Pidgin English.