Append a dictionary array to another dictionary array in Swift

 have two quote dictionaries I'm trying to append after an in-app purchase. I have tried several different methods to append the dictionaries together but I'm still getting an error "No exact matches in call to instance method 'append'" I have established variables for each array to then append the array within the struct. Any thoughts? Is there a better method I should use to add the quotes from the array called QuoteDetails2 to the initial array QuoteDetails?

Here is the code I'm trying to correct:

var topQuotes = [QuoteDetails]()
var additionalQuotes = [QuoteDetails2]()

public struct QuoteProvider {
        
  static func all() -> [QuoteDetails] {
    return
    
      
    
      
      [
              QuoteDetails(
              id: “1”,
              texts: “High school is fun”,
              authors:  “SM”
          ),
              QuoteDetails(
              id: “2”,
              texts: “Middle School is fun”,
              authors:  "A. Philip Randolph"
          ),
              QuoteDetails(
              id: “3”,
              texts: “The playground is fun”,
              authors:  "Booker T. Washington"
          ),
              QuoteDetails(
              id: “4”,
              texts: "Hold on to your dreams of a better life and stay committed to striving to realize it.",
              authors:  “KJ”
          )    
          
      ]

  }
    
    static func all2() -> [QuoteDetails2] {
      return [
         
          QuoteDetails2(
                id: "1",
                texts: "The cat ran fast”,
                authors: " ME”
                
            ),
          QuoteDetails2(
                id: "2",
                texts: “The dog ran fast.”,
                authors: " ME”
               
            ),
                QuoteDetails2(
                id: "3",
                texts: "End life problems”,
                authors: “ME”
               
            )
                
            
        ]

    }
    
    
    func showPremiumQuotes() {
        if UserDefaults.standard.bool(forKey: "premiumQuotes") == true {
           topQuotes.append(contentsOf: additionalQuotes)
        }
    }

    
  /// - Returns: A random  item.
  static func random() -> QuoteDetails {
   
          let allQuotes = QuoteProvider.all()
          let randomIndex = Int.random(in: 0..<allQuotes.count)
          return allQuotes[randomIndex]
          
}
}

Append a dictionary array to another dictionary array in Swift
 
 
Q