function swapAltLanguage(){
	let errs = [];
	try{
		// Hente inn tekst i motsatt spraak (engelsk/norsk ev.t nynorsk/bokmål)
		let otherLangVals = document.querySelectorAll("[data-alt-lang]");
		for (key in otherLangVals){
			try{
				//console.log(otherLangVals[key].innerText + ': ' + typeof otherLangVals[key]);
				if (typeof otherLangVals[key] == 'object'){
					let otherLangString = otherLangVals[key].getAttribute("data-alt-lang");
					if (typeof otherLangString != "undefined"){
						var originalString = otherLangVals[key].innerHTML;
						otherLangVals[key].innerHTML = otherLangString;
						otherLangVals[key].setAttribute("data-alt-lang",originalString);
					}
				}
			}catch(e){
				errs.push('[A] ' + e);
			}
		}
	}catch(e){
		errs.push('[B] ' + e);
	}
	if (errs.length > 0){
		console.log('HVL: swapAltLanguage errors: ' + errs.join(', '));
	}
}