[chaot]

Originally Posted by JSWolf

... I've never seen any commercial eBook use <em> & <strong> for anything other than italics and bold.

Maybe you had so far no special attentions for these nuances!

Source: Brennendes Geheimnis/Stefan Zweig (a fine/perfect designed ¿commercial? ePub)

Aus dem <em class="antiqua">vis-à-vis</em> war ein Nebeneinander geworden, aus der Bekanntschaft eine Freundschaft.

vis-à-vis

Such cases are!

Code

Spoiler:

.antiqua {
    font-family: "Courier New", monospace;
    font-size: smaller;
    font-style: normal
    }