In the absence of an explicit initial text direction, the [[?UAX9]] algorithm - can detect text direction from the initial character. +
In the absence of an explicit initial text direction, + the [=Unicode Bidirectional Algorithm=] detects the text direction from the content. + This depends on the first strongly directional character in the text + or on the context. + Users need to provide [=bidi isolation=] whenever text is inserted into a larger document + in order to avoid [=spillover effects=]. For example "اَلأَعْشَى - 1st place" displays the Arabic characters in a right-to-left fashion, while in memory they would be stored as "اَلأَعْشَى - 1st place"