I want to turn wikitext into HTML for display on a web front-end I'm building. For what I'm doing, all I need is a few constructs like wiklinks, bold, and italic, which I'm able to do with a smallish amount of mwparserfromhell code.

The one annoyance I've got now is I'm using bootstrap in a web front-end, so I don't want <b> and <i> HTML tags. I want is <span class="fw-bold"> (and likewise class="fst-italic") Is there some way to tell mwparserfromhell.nodes.Tag to use that alternate markup when it processes bold or italic wikicode?