SetMarkupEnabled and Label Font

[WildCard]

So I'm working on a plugin to make custom chat windows. There are two labels with SetMarkupEnabled(true).

--Not altering incoming message, only adding color
AppendText("<rgb=" .. channelChatColor .. ">" .. msg .. "</rgb>")

--Removing custom tags (character names, item links, etc)
msg = msg:gsub("%b<>", "");
AppendText("<rgb=" .. channelChatColor .. ">" .. msg .. "</rgb>")

But there seems to be no way to specify the font when LOTRO generates the clickable elements from the custom tags.

Has anyone else encountered this?
Am I just missing something?