Thread:Talk:Directionality support/Language or script?

Is directionality determined by language or script? I've never actually heard anyone talk from R to L. Is there a step further on (like: "en is written in the Latin alphabet, and thus is written LTR"? As an illustration: the language en:Serbo-Croatian is written in Cyrillic script and in Arabic script (and more scripts, but here is the point). -DePiep 23:20, 2 August 2011 (UTC)