Ошибка с заменой букв на странице

var transformConfig = { 
  latin: [ 
  ['А', 'A'], 
  ['а', 'a'], 
  ['Ә', 'Á'], 
  ['ә', 'á'], 
  ['Б', 'B'], 
  ['б', 'b'], 
  ['В', 'V'], 
  ['в', 'v'], 
  ['Г', 'G'], 
  ['г', 'g'], 
  ['Ғ', 'Ǵ'], 
  ['ғ', 'ǵ'], 
  ['Д', 'D'], 
  ['д', 'd'], 
  ['Е', 'E'], 
  ['е', 'e'], 
  ['Ж', 'J'], 
  ['ж', 'j'], 
  ['З', 'Z'], 
  ['з', 'z'], 
  ['И', 'I'], 
  ['и', 'ı'], 
  ['Й', 'I'], 
  ['й', 'ı'], 
  ['К', 'K'], 
  ['к', 'k'], 
  ['Қ', 'Q'], 
  ['қ', 'q'], 
  ['Л', 'L'], 
  ['л', 'l'], 
  ['М', 'M'], 
  ['м', 'm'], 
  ['Н', 'N'], 
  ['н', 'n'], 
  ['Ң', 'Ń'], 
  ['ң', 'ń'], 
  ['О', 'O'], 
  ['о', 'o'], 
  ['Ө', 'Ó'], 
  ['ө', 'ó'], 
  ['П', 'P'], 
  ['п', 'p'], 
  ['Р', 'R'], 
  ['р', 'r'], 
  ['С', 'S'], 
  ['с', 's'], 
  ['Т', 'T'], 
  ['т', 't'], 
  ['У', 'Ý'], 
  ['у', 'ý'], 
  ['Ұ', 'U'], 
  ['ұ', 'u'], 
  ['Ү', 'Ú'], 
  ['ү', 'ú'], 
  ['Ф', 'F'], 
  ['ф', 'f'], 
  ['Х', 'H'], 
  ['х', 'h'], 
  ['Һ', 'Һ'], 
  ['һ', 'h'], 
  ['Ц', 'Ts'], 
  ['ц', 'ts'], 
  ['Ч', 'Ch'], 
  ['ч', 'ch'], 
  ['Ш', 'Sh'], 
  ['ш', 'sh'], 
  ['Ы', 'Y'], 
  ['ы', 'y'], 
  ['І', 'I'], 
  ['і', 'i'], 
  ['Э', 'E'], 
  ['э', 'e'], 
  ['Ю', 'Iý'], 
  ['ю', 'iý'], 
  ['Я', 'Ia'], 
  ['я', 'ia'], 
  ['Щ', ''], 
  ['Ь', ''], 
  ['Ъ', ''], 
  ['щ', ''], 
  ['ь', ''], 
  ['ъ', ''], 
  ['ё', ''], 
  ['Ё', ''], 
  ], 
  cyrillic: [ 
  ['А', 'A'], 
  ['а', 'a'], 
  ['Á', 'Ә'], 
  ['á', 'ә'], 
  ['B', 'Б'], 
  ['b', 'б'], 
  ['V', 'В'], 
  ['v', 'в'], 
  ['G', 'Г'], 
  ['g', 'г'], 
  ['Ǵ', 'Ғ'], 
  ['ǵ', 'ғ'], 
  ['D', 'Д'], 
  ['d', 'д'], 
  ['Е', 'E'], 
  ['е', 'e'], 
  ['J', 'Ж'], 
  ['j', 'ж'], 
  ['Z', 'З'], 
  ['z', 'з'], 
  ['I', 'И'], 
  ['ı', 'и'], 
  ['I', 'Й'], 
  ['ı', 'й'], 
  ['К', 'K'], 
  ['k', 'к'], 
  ['Q', 'Қ'], 
  ['q', 'қ'], 
  ['L', 'Л'], 
  ['l', 'л'], 
  ['М', 'M'], 
  ['m', 'м'], 
  ['N', 'Н'], 
  ['n', 'н'], 
  ['Ń', 'Ң'], 
  ['ń', 'ң'], 
  ['О', 'O'], 
  ['о', 'o'], 
  ['Ó', 'Ө'], 
  ['ó', 'ө'], 
  ['P', 'П'], 
  ['p', 'п'], 
  ['R', 'Р'], 
  ['r', 'р'], 
  ['S', 'С'], 
  ['s', 'с'], 
  ['Т', 'T'], 
  ['t', 'т'], 
  ['Ý', 'У'], 
  ['ý', 'у'], 
  ['U', 'Ұ'], 
  ['u', 'ұ'], 
  ['Ú', 'Ү'], 
  ['ú', 'ү'], 
  ['F', 'Ф'], 
  ['f', 'ф'], 
  ['H', 'Х'], 
  ['h', 'х'], 
  ['Һ', 'Һ'], 
  ['h', 'һ'], 
  ['Ts', 'Ц'], 
  ['ts', 'ц'], 
  ['Ch', 'Ч'], 
  ['ch', 'ч'], 
  ['Sh', 'Ш'], 
  ['sh', 'ш'], 
  ['Y', 'Ы'], 
  ['y', 'ы'], 
  ['І', 'I'], 
  ['і', 'i'], 
  ['E', 'Е'], 
  ['e', 'е'], 
  ['Iý', 'Ю'], 
  ['iý', 'ю'], 
  ['Ia', 'Я'], 
  ['ia', 'я'], 
  ['Э', ''], 
  ['э', ''], 
  ] 
}; 
 
function transform(type) { 
  // выполняем дальше если есть такое свойство 
  if (typeof transformConfig[type] !== 'undefined') { 
    // находим все элементы на странице 
    var collection = document.body.getElementsByTagName('*'); 
    // перебираем все элементы на странице 
    for (var idx = 0; idx < collection.length; idx++) { 
      element = collection[idx]; 
      // если у элемента есть свойство innerHTML, идем дальше 
      if (typeof element.innerHTML !== 'undefined') { 
        transformConfig[type].forEach(function(chars) { 
 
          var pattern = new RegExp( 
            chars[0], 
            'g' 
          ); 
          // изменяем innerHTML 
          element.innerHTML = element.innerHTML.replace( 
            pattern, 
            chars[1] 
          ) 
        }); 
      } 
    } 
  } 
}

html { 
  margin: 0px; 
  padding: 0px; 
} 
 
.hidden-menu { 
  display: block; 
  position: fixed; 
  list-style:none; 
  padding-top: 20vh; 
  padding-left: 0vh; 
  text-align: center; 
  margin: 0; 
  box-sizing: border-box; 
  width: 200px; 
  background-color: #B0E0E6; 
  height: 100%; 
  top: 0; 
  left: -200px; 
  transition: left .2s; 
  z-index: 2; 
  -webkit-transform: translateZ(0); 
  -webkit-backface-visibility: hidden; 
} 
 
.hidden-menu-ticker { 
  display: none; 
} 
 
.btn-menu { 
  color: #fff; 
  background-color: #7B68EE; 
  padding: 5px; 
  position: fixed; 
  top: 5px; 
  left: 5px; 
  cursor: pointer; 
  transition: left .23s; 
  z-index: 3; 
  width: 25px; 
  -webkit-transform: translateZ(0); 
  -webkit-backface-visibility: hidden; 
} 
.btn-menu span { 
  display: block; 
  height: 5px; 
  background-color: #fff; 
  margin: 5px 0 0; 
  transition: all .1s linear .23s; 
  position: relative; 
} 
.btn-menu span.first { 
  margin-top: 0; 
} 
 
.hidden-menu-ticker:checked ~ .btn-menu { 
  left: 160px; 
} 
.hidden-menu-ticker:checked ~ .hidden-menu { 
  left: 0; 
} 
 
.hidden-menu-ticker:checked ~ .btn-menu span.first { 
  -webkit-transform: rotate(45deg); 
  top: 10px; 
} 
.hidden-menu-ticker:checked ~ .btn-menu span.second { 
  opacity: 0; 
} 
.hidden-menu-ticker:checked ~ .btn-menu span.third { 
  -webkit-transform: rotate(-45deg); 
  top: -10px; 
}

<!DOCTYPE html> 
<html lang="en"> 
<head> 
	<link href="https://fonts.googleapis.com/css?family=Roboto+Condensed" rel="stylesheet"> 
	<link rel="stylesheet" href="style.css"> 
	<meta charset="UTF-8"> 
	<title>test</title> 
 
</head> 
<body class="wrapper-seven-eight"> 
	<div id="particles-js"></div> 
 
	<h1 class="wrapper-logo">test</h1> 
	<button onclick="transform('latin')" style="position: absolute; top: 200px; left: 200px">Латинский</button> 
	<button onclick="transform('cyrillic')" style="position: absolute; top: 200px; left: 400px">Кириллица</button> 
	<h2 class="wrapper-welcome">test</h2> 
 
	<!--Боковое меню--> 
	<input type="checkbox" id="hmt" class="hidden-menu-ticker"> 
	<label class="btn-menu" for="hmt"> 
		<span class="first"></span> 
		<span class="second"></span> 
  		<span class="third"></span> 
	</label> 
	<ul class="hidden-menu"> 
  		<Br><Br><li><a href="#">test</a></li><Br><Br> 
  		<li><a href="#">test</a></li><Br><Br> 
  		<li><a href="#">test</a></li>   
	</ul>	 
 
	<!--Скрипты--> 
	<script src="app.js"></script> 
</body> 
</html>