Changes NHK furigana to romaji upon clicking them

NHK-Romaji.js

// ==UserScript==
// @name     Romaji Tooltip
// @version  1
// @grant    none
// @match    https://www3.nhk.or.jp/*
// @require  https://code.jquery.com/jquery-3.3.1.min.js
// @require  https://gist.githubusercontent.com/TSedlar/7a8090760a05c5ff0b7f82edd88ab001/raw/639090330cf619bc7f2cd1497579608afe140a71/Japanese.js
// ==/UserScript==

const translated = {};

const isJapanese = string => {
  const hira = Object.keys(translationMap.hiragana);
  const kata = Object.keys(translationMap.katakana);
  return [...hira, ...kata].some(x => string.indexOf(x) >= 0);
};

const collectElements = () => {
  $(".article-main__title")
    .contents()
    .filter((i, e) => e.nodeType == 3)
    .wrap('<span class="furi-romi-title-wrap"></span>');

  $(".article-main__body p")
    .contents()
    .filter((i, e) => e.nodeType == 3)
    .wrap('<span class="furi-romi-article-wrap"></span>');

  const furigana = $("rt");
  const titleFurigana = $(".furi-romi-title-wrap");
  const articleFurigana = $(".furi-romi-article-wrap");
  const articleLinks = $(".article-main__body p a span[class='under']");

  return [...furigana, ...titleFurigana, ...articleFurigana, ...articleLinks];
};

$(document).ready(() => {
  collectElements()
    .filter(e => {
      const text = $(e)
        .text()
        .trim();
      return text.length > 0 && isJapanese(text);
    })
    .forEach(e => {
      translated[e] = false;
      const original = $(e)
        .text()
        .trim();
      const translation = translateToRomaji(original);
      e.onclick = evt => {
        if (translated[e]) {
          $(e).text(original);
        } else {
          $(e).text(translation);
        }
        translated[e] = !translated[e];
      };
    });
});