Localizable.strings (English)

"name" = "Great Dane";
"favoriteButton" = "Favorite";

Localizable.strings (Japanese)

"name" = "グレートデーン";
"favoriteButton" = "お気に入り";

Localized.swift

import SwiftUI

struct ContentView: View {
    
    var body: some View {
        HStack {
            Image("Dog001", label: Text("name"))
                .resizable()
                .aspectRatio(contentMode: .fit)
                .frame(height: 80)
            VStack(alignment: .leading) {
                Text("name")
                    .font(.headline)
                    .padding(.bottom, 10)
                HStack {
                    Spacer()
                    Button(action: {}) {
                        Image(systemName: "star.fill")
                        Text("favoriteButton")
                    } // Button
                    .padding()
                    .foregroundColor(Color(UIColor.label))
                    .background(Color(UIColor.systemBackground))
                    .cornerRadius(5)
                } // HStack
            } // VStack
        } // HStack
        .padding()
        .frame(width: UIScreen.main.bounds.width * 0.8)
        .background(Color.gray)
        .cornerRadius(12)
        .padding()
    }
    
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ForEach(["en", "ja"], id: \.self) { (identifier)  in // 言語: 英語、日本語
            ContentView()
                .environment(\.locale, .init(identifier: identifier)) // 言語の指定
                .previewLayout(.sizeThatFits)
        }
    }
}