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Esperanto is written in a Latin-script alphabet of twenty-eight letters, with upper and lower case. This is supplemented by punctuation marks and by various logograms, such as the digits 0–9, currency signs such as $ € ¥ £ ₷, and mathematical symbols. The creator of Esperanto, L. L. Zamenhof, declared a principle of "one letter, one sound", though this is a general rather than strict guideline.[1]
Twenty-two of the letters are identical in form to letters of the English alphabet (q, w, x, and y being omitted). The remaining six have diacritical marks: ĉ, ĝ, ĥ, ĵ, ŝ, and ŭ – that is, c, g, h, j, and s circumflex, and u breve.
- ^ Kalocsay & Waringhien, Plena analiza gramatiko, § 17