EditLive has several tools for setting the language and text direction of content in the editor.
Text direction can be changed using using the "Left to Right Text" and " Right to Left Text" menu items. By default, these are in the Format menu. These buttons change the text direction for the current paragraph only.
The "Content Language" drop-down lets you set the language for the selected text. This also sets the text direction for this text.
To remove the language, select the text and click the "Remove Language" item on the drop-down.