Aim and Focus: The paper describes the speech sounds, syllable structure and tone system of a less-studied, West African language, Lɛtɛ. Lɛtɛ is a South-Guan language of Ghana, West Africa, and genetically affiliated to the Niger-Congo family of languages. Eberhard, Simons and Fennig (2019) sub-classifies Guan (Niger-Congo, Kwa) into two language clusters: North Guan and South Guan, to which Lɛtɛ belongs. Findings: Lɛtɛ has a symmetrical set of nine vowels, 4 front vowels produced with an advanced tongue root position and four back vowels produced with a retracted tongue root position. The ninth vowel is a low central vowel, /ǝ /, which is produced with an advanced tongue root position, but unpaired. Its vowel and consonant systems are akin...