It is based on the 26 letters of the basic braille alphabet used for Grade-1 English Braille, so the print digraph ch is written as a digraph ⠉⠓ in braille as well. The letter ñ/ŋ[ŋ] of several of the print alphabets is distinguished from the sequence ng[ŋɡ] with an apostrophe: ⠝⠛⠄ñ, as in the equivalent ng’ of print Bemba. The various alphabets, including digraphs that occur in any one of them, can thus be summarized as:
a
b
bb
c
cc
ch
d
e
f
g
h
hh
i
j
k
kh
kk
l
m
n
ñ, ŋ, ng’
o
p
ph
q
r
s
sh
th
t
u
v
w
x
y
z
Bemba has the basic alphabet plus ng’, sh, and in some orthographies ch in place of c. Chewa (Nyanja) has ch; Lozi, Lunda and Kaonde have ch, sh, and ñ; Luvale has ch, sh, ph, kh, th; and Tonga has ch, sh, bb, cc, hh, kk, and ŋ.
Numbers and punctuation are as in traditional English Braille.
