Urdu alphabet
While the Urdu alphabet is derived from the Arabic alphabet informal Romanised Urdu is less eccentric than informal Romanised Arabic. Informal Romanised Urdu does not use numerals, and rarely uses mixed case, because the Arabic letters that lack a clear equivalent in the English Latin alphabet (e.g. ) are often silent in Urdu or pronounced identically to other letters (e.g. ). So, this system of Urdu Romanisation is used in some slightly more formal contexts than informal Romanised Arabic.