A server for training a translation model, an electronic device using the trained translation model, and methods therefor are disclosed. The server includes memory storing instructions, an actual speech that is uttered in a first language, a first text corresponding to the actual speech, a second text in a second language and corresponding to the first text, and a translation model; and at least one processor, wherein the instructions, when executed by the at least one processor individually or collectively, cause the server to generate a synthesized speech corresponding to the first text, and train the translation model by using the actual speech, the first text, the synthesized speech, and the second text.