"对话关键码" can be translated as "dialogue key code" or "conversation key code" in English, depending on the specific context.
"Dialogue key code" might be more commonly used in scenarios related to interactive systems, chatbots, or any context where a key code is used to trigger or identify specific dialogues or conversations.
"Conversation key code" could be used in a broader range of communication-related contexts, emphasizing the key code's role in facilitating or identifying particular conversations.
In most technical or programming-related contexts, "dialogue key code" would likely be the more appropriate choice, as it directly relates to the concept of a dialogue or interaction. However, the exact translation may vary slightly depending on the specific industry or application.