Translation device

A translation device that acquires an input sentence in a first language, communicates with an external device executing machine translation from the first language into a second language, and outputs a translated sentence indicating a translation result of the input sentence, the translation device comprising:

• a memory that stores first dictionary information and second dictionary information, the first dictionary information including a replacement target term in the first language and a translated word in the second language for the replacement target term in association with each other, and the second dictionary information including a plurality of alternative terms each used instead of the replacement target term in the first language and translated words in the second language for the alternative terms in association with each other;
• a controller that replaces the replacement target term included in the input sentence with the alternative term to generate a replaced sentence indicating a replacement result;
• and
• a communication interface that outputs the replaced sentence to the external device and acquires a translation result of the replaced sentence in the second language from the external device, wherein
• the controller determines whether a translated word of the alternative term is present in the translation result of the replaced sentence acquired from the communication interface,
• when it is determined that the translated word of the alternative term is not present, the controller renews the replaced sentence using a different alternative term from the alternative term associated with the translated word in the second dictionary information and causes the communication interface to output the renewed replaced sentence, and
• when it is determined that the translated word of the alternative term is present, the controller replaces the translated word with a translated word associated with the replacement target term in the first dictionary information to generate the translated sentence.