If you open a play ground and paste this code, you’ll notice that the decoded object is nil. The JSON object [{"transcript":"A person might say, "Hello"."}] passes any linter successfully but it seems like the default JSON decoder in Swift has an issue with the escaped double quotes (") in the transcript. To make sure, in my playground when I remove the two escaped double quotes from the string, it works fine.

var testData2 = """
[{"transcript":"A person might say, "Hello"."}]
"""
struct TranscriptModel: Codable, Identifiable {
    let id = UUID()
    let transcript : String
}
typealias Transcripts = [TranscriptModel]
let decodedResponse1 = try? JSONDecoder().decode(Transcripts.self, from: Data(testData2.utf8))
print(decodedResponse1)

It seems like a bug in Swift’s JSON decoder? Is there a work around so that I can show double quotes in my json string?

If used by itself within your code, swift recognizes the escaped double quote and works perfectly by showing the " symbol as you can see in the picture below