LTR stands for Left to Right and is used as the antonym of RTL, Right to Left, in the context of which direction a script runs on a page or other medium. The majority of modern languages are written LTR. LTR scripts invariably also run top to bottom too, so the text starts and is read from the top left corner, traverses the page to the right margin then returns to the left margin of the line below, as this block of text does.

Internet browsers as well as Tiki assumes all languages are LTR and Themes and Bootstrap format text accordingly.
Tiki manages RTL and LTR languages per page or mixed content as supported by the i18n admin feature.
Using the advantage of Bootstrap integration Tiki is compatible with multilingual and RTL languages.