Talk:Tanya von Degurechaff/Image Gallery/@comment-2602:304:891D:80B9:197A:E417:4D2C:21B1-20190412152318/@comment-104.185.157.128-20190614203029

Hopefully this answer finds you even though it's months after you posted this... Basically, gokigen'yō is sort of a fancier greeting/parting term that can be translated as either "hello" or "good day" in English, depending on whether the character is saying it when they are first seeing someone or when they are about to leave a conversation.

When Tanya says it to the soldiers she's about to kill, she says "Gokigen'yō and Gokigen'yō"-- since she's meeting them for the first time, she's saying hello, and then she repeats the word again, but this time with the different meaning of "good day/goodbye" because she's going to kill them and leave.

Since there isn't really a way to portray that sort of double meaning/wordplay in English, it's translated as "Hello" (the greeting) and "Gooddie" (the parting), I'm guessing to combine the message of "goodbye" and "I'm going to kill you; you'll die".