Ç

Ç (lowercase ç), called C with cedilla, is a Latin-script letter formed by adding the cedilla, a small hook-shaped mark, beneath the letter C. In Romance languages such as French, Portuguese, and Catalan it marks a soft, s-like pronunciation of c before the vowels a, o, and u, where plain c would be read as /k¹. In Turkish it instead denotes a voiceless affricate, the sound written "ch" in English². The letter is encoded in Unicode as U+00C7 (capital) and U+00E7 (lowercase), Latin Capital/Small Letter C with Cedilla³.

Function in individual languages

Romance languages. In French, Portuguese, and Catalan the cedilla resolves an ambiguity of the plain letter c, which is pronounced /k/ before the vowels a, o, and u. The mark signals that the c keeps the soft, s-like value it otherwise has before e and i; examples include French façade and garçon and Portuguese açaí and coração¹. In Catalan the grapheme is called ce trencada ("broken c") and is written only before a, o, and u, never before e or i: força, caça, but forces, forcis⁸.

Turkish and related languages. In Turkish, ç denotes a voiceless affricate, the sound written "ch" in English, and the language pairs it with ş, an s with cedilla; Turkish does not place a cedilla under t². Azerbaijani, whose alphabet is very similar to Turkish, uses the same letter².

Spanish history. In medieval and classical Spanish the ç marked, before a, o, and u, the same soft articulation that c had before e and i¹. Its use declined after a sixteenth-century orthographic reform, and the letter disappeared from the Spanish alphabet in 1775^{1 • 6}. According to the philologist Mila Segarra, the mark itself evolved from a kind of z used in Hispano manuscripts, which also explains the Spanish name meaning "little z"⁹.

Typography and encoding

Ç belongs to the Latin-1 Supplement block (range 0080–00FF), so it is available in essentially every modern character set¹⁰. Under Unicode normalization its canonical decomposed form is the plain letter C followed by the combining cedilla (U+0327), and the composed and decomposed forms are canonically equivalent⁴.

The glyph varies by language tradition. In Portuguese and Catalan the traditional connecting cedilla, attached to the bottom curve of the c, is the preferred design for Ç and ç, while French typography often shows a detached cedilla or a stroke passing beneath the letter¹¹. For the s with cedilla used in Turkish, Unicode distinguishes a separate pair of code points (U+015E/U+015F), while modern Romanian text is written with s and t with comma below (U+0218–U+021B), a disunification made because the two marks behave differently in the two languages¹². An under-comma glyph remains an acceptable alternative for Ç in some designs¹¹.

Beyond c, the cedilla or a comma below appears under other Latin letters in various alphabets, including s, k, l, n, r, and t¹¹.

Diacritic complexity and processing

Letters such as ç are the unit of analysis in computational work on diacritics. A 2026 cross-linguistic study of "diacritic complexity" by Adi Cohen and Yuval Pinter computed information-theoretic measures of character-diacritic combinations over 24 corpora in 15 languages and found that higher complexity correlates strongly with lower accuracy in diacritics-restoration tasks performed by BERT- and RNN-based models¹³. Because ç is a precomposed single character rather than a base letter plus combining mark, transcription standards such as OCR-D encode it directly by its Unicode code point without combining marks¹⁴.

References

1. La RAE aclara el nombre del signo ç que tanto llama la atención, HuffPost España
2. A field guide to recognizing EU languages
3. Unicode Character "Ç" (U+00C7), Compart
4. UAX #15: Unicode Normalization Forms
5. Cedilla, Etymonline
6. La letra que desapareció del alfabeto español, Diario AS
7. Letter Database: Azerbaijani (Latin script), EKI
8. L'alfabet, Consorci per a la Normalització Lingüística
9. I tu, com escrius la Ç? betevé
10. C1 Controls and Latin-1 Supplement, Unicode 18.0.0 code chart
11. Character design standards - Diacritics, Microsoft Learn
12. The Unicode Standard, Version 12.0, Chapter 7
13. Adi Cohen, Yuval Pinter (2026). The Degree of Language Diacriticity and Its Effect on Tasks. arXiv.
14. OCR-D GT Guidelines, Level 2 (diacritics)

Topic: Encyclopedia › Society and history › Languages and linguistics › Writing and notation systems › Latin script

Initially written Sep 17, 2026 · Reviewed: Oct 25, 2026 · Edited: Oct 15, 2026; Oct 25, 2026 · Last review: Oct 25, 2026

© 2026 Biostate AI. Free to use with credit under the Edgepedia Community License. Developers: read Edgepedia by API or MCP. Embed a reference card.