quality:correction
Orthography

Swahili is now written in the Latin alphabet. There are a few digraphs for native sounds, ch, sh, ng ' and ny; q and x are not used, c is not used apart from the digraph ch, unassimilated English loans and, occasionally, as a substitute for k in advertisements. There are also several digraphs for Arabic sounds, which many speakers outside of ethnic Swahili areas have trouble differentiating.

The language used to be primarily written in the Ajami script, which is an Arabic script. Much literature was produced in this script. With the introduction of Latin, the use of Ajami script has been diminished significantly. However, the language continues to have a tradition of being written in Arabic script. Starting from the later half of the 19th century, continuing into the 20th century, and going on in the 21st century, a process of "Swahilization" of the Arabic Script has been underway by Swahili scribes and scholars. The first of such attempts was done by Mwalimu Sikujua, a scholar and poet from Mombasa. However, the spread of a standardized indigenous variation of Arabic script for Swahili was hampered by the colonial takeover of East Africa by the United Kingdom and Germany. The usage of Arabic script was suppressed in German East Africa and to a lesser extent in British East Africa. Nevertheless, well into the 1930s and 1940s, rural literacy rate in Arabic script as well as a local preference to write Swahili in the Arabic script (an unmodified version as opposed to proposals such as that of Mwalimu Sikujua) was relatively high. There were also differences in orthographic conventions between cities and authors and over the centuries, some quite precise but others different enough to cause difficulties with intelligibility. Thus despite a lack of official governmental backing, attempts at standardization and Swahilization of the Arabic script continued into the 20th century.