you js code is broken
 
window.addEventListener('DOMContentLoaded', (event) => {
    const lang = document.documentElement.getAttribute('lang');
    if (lang === 'en-us') {
        document.querySelector('.unit-price').innerHTML = document.querySelector('.unit-price').innerHTML.replace('/ meeter', 'per meter');
    } else if (lang === 'en-us') {
		    document.querySelector('.unit-price').innerHTML = document.querySelector('.unit-price').innerHTML.replace('tk', 'pc.');
    }
}
	you are missing ) at the end, it should be like that
 
window.addEventListener('DOMContentLoaded', (event) => {
    const lang = document.documentElement.getAttribute('lang');
    if (lang === 'en-us') {
        document.querySelector('.unit-price').innerHTML = document.querySelector('.unit-price').innerHTML.replace('/ meeter', 'per meter');
    } else if (lang === 'en-us') {
		    document.querySelector('.unit-price').innerHTML = document.querySelector('.unit-price').innerHTML.replace('tk', 'pc.');
    }
})