let text_de = document.getElementById("langDE"); let text_en = document.getElementById("langEN"); let btn_changeToDe = document.getElementById("langPickerDE"); let btn_changeToEn = document.getElementById("langPickerEN"); let lang = (typeof document.documentElement.lang == "string") ? document.documentElement.lang: "en" function changeLang(lang){ if(lang == "de"){ text_de.classList.remove("hidden"); text_en.classList.add("hidden"); }else{ text_en.classList.remove("hidden"); text_de.classList.add("hidden"); } } btn_changeToEn.addEventListener("click", () => { changeLang("en") } ); btn_changeToDe.addEventListener("click", () => { changeLang("de") } ); // Do stuff on loading changeLang( lang );