JSFiddle - React, Tailwind, and code Playground

JavaScript

var str = "";
var site = "site.ru";
var mass = {
	's':"с",
	'i':"а",
	't':"й",
	'e':"т",
	'.':".",
	'r':"р",
	'u':"у"
};
for(x = 0; x < site.length; x++) {
	str = str + mass[site[x]];
}
alert(str);