function owo(text) {
  text = text.replace(/(?:r|l)/g, "w");
  text = text.replace(/(?:R|L)/g, "W");
  text = text.replace(/n([aeiou])/g, 'ny$1');
  text = text.replace(/N([aeiou])/g, 'Ny$1');
  text = text.replace(/N([AEIOU])/g, 'Ny$1');
  text = text.replace(/ove/g, "uv");
  return text;
}

function replace_owo(element) {
  for (var i = 0; i < element.childNodes.length; ++i) {
    if (element.childNodes[i].nodeType == Node.TEXT_NODE) {
      element.childNodes[i].textContent = owo(element.childNodes[i].textContent);
    } else {
      replace_owo(element.childNodes[i]);
    }
  }
}

replace_owo(document.body);