Final answer:
In real-time language translation, Natural Language Processing (NLP), Machine Learning, and Neural Networks are required, but Data Encryption is not necessary for translation itself, only for data security.
Step-by-step explanation:
Translating spoken language in real time so that people can carry on a conversation requires several technologies, but not all of them are necessary for the actual process of language translation. The layers of technology that are essential include Natural Language Processing (NLP), Machine Learning, and Neural Networks. These technologies enable the understanding, interpretation, and generation of human languages by machines. However, Data Encryption is not required for the translation process itself, though it is important for securing the data during transmission.