rtl_tweetdeck.js

// ==UserScript==
// @name         RTL tweetdeck
// @namespace    http://py4.ir
// @version      0.1
// @description  RTL support for tweetdeck without messing LTR.
// @author       py4
// @match        https://tweetdeck.twitter.com/*
// @grant        none
// @include      https://tweetdeck.twitter.com/*
// ==/UserScript==

$(document).ready(function() {
    $("p.js-tweet-text").each( function(index) {
        if(($(this).text().match(/[\u0600-\u06FF\uFB8A\u067E\u0686\u06AF]/)))
            $(this).css("direction","rtl");
    }
    )

    $(document).bind('DOMNodeInserted', function(event) {
        if(event.target.classList.contains("js-stream-item")) {
            p = $(event.target).find(".js-tweet-text");
            if(p.text().match(/[\u0600-\u06FF\uFB8A\u067E\u0686\u06AF]/))
                p.css("direction","rtl");
        }
    });
});