css/css-writing-modes/writing-mode-vlr-007-manual.html

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<title>writing mode:vertical-lr, default Latin orientation</title>
<link rel="author" title="Richard Ishida" href="mailto:ishida@w3.org"/>
<link rel="help" href="https://drafts.csswg.org/css-writing-modes-3/#block-flow"/>
<meta name="assert" content="By default, writing-mode:vertical-lr will display Latin characters rotated 90° right."/>
<style type="text/css">
@font-face {
    font-family: 'webfont';
    src: url('/fonts/noto/NotoSansMongolian-regular.woff2') format('woff2');
    font-weight: normal;
    font-style: normal;
	}
.test, .ref { font-family: webfont, serif; font-size: 24px;  float: left; margin-right: 30px;color: #ccc; }
span[lang=en] { color: black; }
</style>
<!-- this is the test -->
<style type="text/css">
.test { writing-mode: vertical-lr; }
</style>
</head>
<body>
<p class="instructions" dir="ltr">Test passes if the text runs vertically and the orientation of the Latin characters is the same as on the blue background.</p>
<div class="test" lang="mn">ᠮᠤᠩᠭᠤᠯ <span lang="en">W3C i18n</span> ᠤᠯᠤᠰ</div>
<div class="ref"><img src="support/mn+latin.png" alt="ref image"/></div>
</body>
</html>