optionEl.classList.add("language-option");

          optionEl.innerText = capitalizeFirstLetter(sampleLanguage);

          optionEl.addEventListener(
            "click",
            function updatePreferredLanguage(evt) {
              var preferredLanguageId = optionEl.getAttribute("data-lang");
              window.localStorage.setItem(
                "preferred-gradle-dsl",
                preferredLanguageId