what i've done so far

Sources/EeveeSpotify/Shared/Models/Extensions/StringArray+Extension.swift

@@ -0,0 +1,20 @@
+import Foundation
+import NaturalLanguage
+
+extension Array where Element == String {
+    var canBeRomanized: Bool {
+        var languageList: [NLLanguage] = []
+        
+        for line in self {
+            if let language = NLLanguageRecognizer.dominantLanguage(for: line) {
+                languageList.append(language)
+            }
+        }
+        
+        let canBeRomanizedLanguageCount = languageList.filter {
+            [.japanese, .korean, .simplifiedChinese, .traditionalChinese].contains($0)
+        }.count
+
+        return Double(canBeRomanizedLanguageCount) / Double(languageList.count) > 0.15
+    }
+}