Найти наиболее распространенные элементы в массиве объектов

const data = [{
    country: "US",
    languages: [
      "en"
    ]
  },
  {
    country: "BE",
    languages: [
      "nl",
      "fr",
      "de"
    ]
  },
  {
    country: "NL",
    languages: [
      "nl",
      "fy"
    ]
  },
  {
    country: "DE",
    languages: [
      "de"
    ]
  },
  {
    country: "ES",
    languages: [
      "es"
    ]
  }
]

const countLanguages = new Map();
data.forEach(country => {
    country.languages.forEach(lang => {
        if (!countLanguages.has(lang)){
            countLanguages.set(lang, 1);
        }
        else countLanguages.set(lang, countLanguages.get(lang) + 1);
    })
    
})


const sorted = [...countLanguages.entries()].sort();
console.info("Most occurrences:", sorted[0])