The Bamum scripts are an evolutionary series of six scripts created for the Bamum language by Ibrahim Njoya, King of Bamum (now western Cameroon). They are notable for evolving from a pictographic system to a semi-syllabary in the space of fourteen years, from 1896 to 1910. Bamum type was cast in 1918, but the script fell into disuse around 1931. A project began around 2007 to revive the Bamum script. ^[1]

Quick Facts Bamum, Script type ...

Bamum
A book in the sixth Bamum script, c. 1910.
Script type	Syllabary
Time period	c. 1896, moribund c. 1931, revived c. 2007
Direction	Left-to-right
Languages	Bamum
Related scripts
Child systems	Bagam?
ISO 15924
ISO 15924	Bamu (435), ​Bamum
Unicode
Unicode alias	Bamum
Unicode range	U+A6A0–U+A6FF Bamum U+16800–U+16A3F Bamum Supplement
This article contains phonetic transcriptions in the International Phonetic Alphabet (IPA). For an introductory guide on IPA symbols, see Help:IPA. For the distinction between [ ], / / and ⟨ ⟩, see IPA § Brackets and transcription delimiters.

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In its initial form, Bamum script was a pictographic mnemonic aid (proto-writing) of 500 to 600 characters. As Njoya revised the script, he introduced logograms (word symbols). The sixth version, completed by 1910, is a syllabary with 80 characters. It is also called a-ka-u-ku after its first four characters. The version in use by 1906 was called mbima.^[2]

The script was further refined in 1918, when Njoya had copper sorts cast for printing. The script fell into disuse in 1931 with the exile of Njoya to Yaoundé, Cameroon.^[3]

At present, Bamum script is not in any significant use. However, the Bamum Scripts and Archives Project is attempting to modernize and revive the script. The project is based in the old Bamum capital of Foumban.^[4]

The 80 glyphs of modern Bamum are not enough to represent all of the consonant-vowel syllables (C V syllables) of the language. This deficiency is made up for with a diacritic or by combining glyphs having CV₁ and V₂ values, for CV₂. This makes the script alphabetic for syllables not directly covered by the syllabary. Adding the inherent vowel of the syllable voices a consonant: tu + u = /du/, fu + u = /vu/, ju + u = /ʒu/, ja + a = /ʒa/, ʃi + i = /ʒi/, puə + u = /bu/.

The two diacritics are a circumflex (ko'ndon) that may be added to any of the 80 glyphs, and a macron (tukwentis) that is restricted to a dozen. The circumflex generally has the effect of adding a glottal stop to the syllable, for instance kâ is read /kaʔ/, though the vowel is shortened and any final consonant is dropped in the process, as in pûə /puʔ/ and kɛ̂t /kɛʔ/. Prenasalization is also lost: ɲʃâ /ʃaʔ/, ntê /teʔ/, ntûu /tuʔ/. Sometimes, however, the circumflex nasalizes the vowel: nî /nɛn/, pî /pin/, rê /rɛn/, jûʔ /jun/, mɔ̂ /mɔn/, ɲʒûə /jun/ (loss of NC as with glottal stop). Others are idiosyncratic: ɲʒə̂m /jəm/ (simple loss of NC), tə̂ /tɔʔ/ (vowel change), ɲî /ɲe/, riê /z/, m̂ /n/, ʃɯ̂x /jɯx/, nûə /ŋuə/, kɯ̂x /ɣɯ/, rə̂ /rɔ/, ŋkwə̂n /ŋuət/, fɔ̂m /mvɔp/, mbɛ̂n /pɛn/, tî /tɯ/, kpâ /ŋma/, vŷ /fy/, ɣɔ̂m /ŋɡɔm/.^[5]

The macron is a 'killer stroke' that deletes the vowel from a syllable and so forms consonants and NC clusters (/nd, ŋɡ/) that can be used for syllable codas. Consonantal /n/ is used both as a coda and to prenasalize an initial consonant. The two irregularities with the macron are ɲʒūə, read as /j/, and ɔ̄, read as /ə/.

The script has distinctive punctuation, including a 'capitalization' mark (nʒɛmli), visually similar to an inverted question mark, for proper names, and a decimal system of ten digits; the old glyph for ten has been refashioned as a zero.

Bamum's 88 characters were added to the Unicode standard in October, 2009 with the release of version 5.2. Bamum Unicode character names are based on the International Phonetic Alphabet forms given in L’écriture des Bamum (1950) by Idelette Dugast and M.D.W. Jeffreys:^[6]

The Unicode block for Bamum is U+A6A0–U+A6FF:

Historical stages of Bamum script were added to Unicode in October, 2010 with the release of version 6.0. These are encoded in the Bamum Supplement block as U+16800–U+16A3F. The various stages of script development are dubbed "Phase-A" to "Phase-E". The character names note the last phase in which they appear. For example, U+168EE 𖣮 BAMUM LETTER PHASE-C PIN is attested through Phase C but not in Phase D.