İske imlâ alphabet

İske imlâ (Tatar: иске имлә, iske imlä, ايسكى ايمله, pronounced [isˌkɘ̆‿imˈlʲæ]; lit. 'old orthography') is an Arabic-based script used for writing the Tatar language. It was the most widely used Tatar script before 1920, and was also used for the Old Tatar language (Ural-Volga Turki). İske imlâ literally means "old orthography" and was named in contrast to the Yaña imlâ script, the "new orthography" which displaced İske imlâ.

The final script was reformed by Qayum Nasiri in the 1870s. Additional characters that could not be found in Arabic and Persian were borrowed from the Chagatai language. Unlike Yaña imlâ, İske imlâ is an abjad, although the two scripts are derived from the same source.

İske imlâ is still used by Chinese Tatars, who speak an archaic variant of the Tatar language.