@bminer1 I had the same issue so I made a function to overwrite the headings. It’s done client-side post load so not ideal but it’s a start :-)
You can change the time interval at which it refreshes (it needs to keep doing this if you cycle through leagues).

setInterval (changePrem,10000);

function changePrem() {
    var prem = document.querySelector("#module_6_MMM-SoccerLiveScore div.module-content header").innerHTML; 
    var premchange = prem.replace("Pr. League", "Premier League");
    document.querySelector("#module_6_MMM-SoccerLiveScore div.module-content header").innerHTML = premchange;
}

Make a js file out of this and load it at the bottom of the main index.html file