JSFiddle - React, Tailwind, and code Playground

JavaScript

str = "нэг two хоёр one";

strArray = str.split(/[ ,]+/);

for (var s in strArray) {
  alert(strArray[s] + ': ' + /[а-яА-ЯЁёӨөҮү]/.test(strArray[s]));
}