JSFiddle - React, Tailwind, and code Playground

HTML

<dl>
    <dt>lang="en-US"</dt>
    <dd lang="en-US">
        <div>
            <span style="text-decoration: underline;">underline (ygj_)</span>
            <span style="text-decoration: overline;">overline (ygj_)</span>
        </div><div style="writing-mode: tb-rl; writing-mode: vertical-rl;">
            <span style="text-decoration: underline;">underline (ygj_)</span>
            <span style="text-decoration: overline;">overline (ygj_)</span>
        </div>
        <div style="writing-mode: tb-lr; writing-mode: vertical-lr;">
            <span style="text-decoration: underline;">underline (ygj_)</span>
            <span style="text-decoration: overline;">overline (ygj_)</span>
        </div>
    </dd>
    <dt>lang="ja"</dt>
    <dd lang="ja">
        <div>
            <span style="text-decoration: underline;">underline (ygj_)</span>
            <span style="text-decoration: overline;">overline (ygj_)</span>
        </div><div style="writing-mode: tb-rl; writing-mode: vertical-rl;">
            <span style="text-decoration: underline;">underline (ygj_)</span>
            <span style="text-decoration: overline;">overline (ygj_)</span>
        </div>
        <div style="writing-mode: tb-lr; writing-mode: vertical-lr;">
            <span style="text-decoration: underline;">underline (ygj_)</span>
            <span style="text-decoration: overline;">overline (ygj_)</span>
        </div>
    </dd>
    <dt>lang="ko"</dt>
    <dd lang="ko">
        <div>
            <span style="text-decoration: underline;">underline (ygj_)</span>
            <span style="text-decoration: overline;">overline (ygj_)</span>
        </div><div style="writing-mode: tb-rl; writing-mode: vertical-rl;">
            <span style="text-decoration: underline;">underline (ygj_)</span>
            <span style="text-decoration: overline;">overline (ygj_)</span>
        </div>
        <div style="writing-mode: tb-lr; writing-mode: vertical-lr;">
            <span style="text-decoration:...

CSS

dd {
    font-size: 5em;
    font-family: serif;
}
div {
    margin-top: 1em;
    margin-bottom: 1em;
}
span {
    white-space: nowrap;
    text-orientation: sideways-right;
}