How Should You Translate ‘고생 많았어요’?
The same greeting needs a different translation depending on who you say it to and where, and these examples show how translating just the sentence differs from translating with the earlier conversation in view.

At the end of the workday, you message a coworker “오늘 고생 많았어요.” (oneul gosaeng manasseoyo). Translate it word for word and you get “You suffered a lot today.” The grammar is fine, but the person reading it hears worry, not comfort.
What an English-speaking coworker would actually say in the same moment is closer to this.
Thanks for all your hard work today.
Words whose meaning lives outside the sentence
A lot of the time, the meaning sits outside the sentence. Sentences that drop the subject or object are like that. “보냈어.” (bonaesseo, “Sent [it].”) on its own doesn’t say what was sent, but if you were just talking about a file, “I just sent you the file.” is the right translation. “Works for me.” is the same. If you were in the middle of picking a meeting time, it means “저는 그 시간 괜찮아요.” (jeoneun geu sigan gwaenchanayo, “That time is fine for me.”).
Tone matters too. Translate “ㅋㅋㅋ 진짜? 대박” (roughly “keu-keu-keu, jinjja? daebak”) letter for letter and you get nonsense. It only works as conversation once it’s turned into the way friends talk in that language, like “lol really? That’s amazing!”
NATILO translates with the recent conversation, who’s speaking and their tone all in view. That’s why the same sentence can be translated differently from one conversation to the next.
But the original stays
Translating with the earlier conversation in view means more interpretation goes in. That’s why NATILO doesn’t erase the original. Tap a message and you can see the original anytime, and you can also check exactly what sentence your own message reached the other person as.
The translation examples in this post were made to show how NATILO carries a conversation across languages. Actual translations may vary from conversation to conversation.