Several braille alphabets are used in Nigeria. For English, Unified English Braille has been adopted. Three other languages have been written in braille: Hausa, Igbo, and Yoruba. All three alphabets are based on English readings, with the addition of letter's particular to these languages. Punctuation is as in English Braille.
Basic braille alphabet 
a b c d e f g h i j k l m 
n o p q r s t u v w x y z
The letters of these languages beyond the basic Latin alphabet are as follows: