Right to Left (RTL) version of Oswald HTML Pro can be easily setup with special Gulp and Webpack task that depends on Gulp RTLCSS and RTLCSS tools.
--rtl flag in theme/tools/ folder to generate the RTL versions of CSS files.
            gulp --rtlnpm run build --rtl*.rtl.css suffix to files that have RTL versions generated in assets folder:
            <!--begin::Page Vendor Stylesheets(used by this page)-->
<link href="assets/plugins/custom/prismjs/prismjs.bundle.rtl.css" rel="stylesheet" type="text/css" />
<!--end::Page Vendor Stylesheets-->
<!--begin::Global Stylesheets Bundle(used by all pages)-->
<link href="assets/plugins/global/plugins.bundle.rtl.css" rel="stylesheet" type="text/css" />
<link href="assets/css/style.bundle.rtl.css" rel="stylesheet" type="text/css" />
<!--end::Global Stylesheets Bundle--><html direction="rtl" dir="rtl" style="direction: rtl">"compile": {
    "rtl": {
        "enabled": false,
        "skip": [
            "select2",
            "line-awesome",
            "fontawesome5",
            "nouislider",
            "tinymce",
            "sweetalert2"
        ]
    }
}data-kt-menu-placement="bottom-start" => data-kt-menu-placement="bottom-end"
data-kt-menu-placement="right-start" => data-kt-menu-placement="left-start" 
            