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 <https://getbootstrap.com/> in a web front-end, so I don't want <b> and <i> HTML tags.  I want is <span class="fw-bold"> <https://getbootstrap.com/docs/5.0/utilities/text/#font-weight-and-italics>  (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?