Disclosed is a system comprising a memory storing a first natural language understanding model. The memory stores instructions that, when executed, cause a processor to: receive a request for generating a second natural language understanding model in a second language different from the first language; translate the first set of utterances into a second set of utterances in the second language; provide a second set of tags or intents to the second set of utterances; provide a user interface for receiving at least one input for modifying from among the second set of utterances or the second set of tags or intents; generate a third set of utterances and a third set of tags or intents on the basis of the input received through the user interface; and establish the second natural language understanding model including the third set of utterances and the third set of tags or intents.