Highlight the plain text in XML (or HTML, SGML, etc)

$ xmlpager LuminoCity/assets/conversations/eng/*/*.xml
<?xml version="1.0" encoding="UTF-8"?><convoscene>
    <textboxes>
        <box>RowCaptain</box><box>Crew</box><box>Lumi</box><box>Lumi_Thought</box><box>PumpSailor</box><box>Captain</box><box>boatAll.captain.Captain</box>
    </textboxes>
    <conversations>
        <conversation name="PumpSailorIntro" flow="loop" loopPoint="3">
            <linegroup>
                <line box="Lumi">Do you mind if I ask why there's a boat up here?</line><line box="PumpSailor">Well now, 'why' would suggest this was supposed to happen.</line><line box="PumpSailor">This wasn't in the Capt'n's plans, way back when.</line><line box="PumpSailor">There we were.
                    Navigating the river out to the west ocean.
                </line>
                <line box="PumpSailor">Night time. Couldn't see the hand infront of my face. 
                    Or an almighty wheel, come to that.
                </line>
                <line box="PumpSailor">Next thing we know, almighty crunch!</line><line box="PumpSailor">Boat stops rocking.
                    Starts floating.
                </line>
                <line box="PumpSailor">Then there's this mighty grinding sound. 
                    The wheel, grinding its gears.
                </line>
                <line box="PumpSailor">Boat stops moving.
                    Right here.
                </line>
                <line box="Lumi">You're stuck?</line><line box="PumpSailor">Aye. 
                    Ran a-ground, we did.
                </line>
                <line box="PumpSailor">Ran a-sky.</line>
            </linegroup>