Can להתראות be written with a י ? Ive seen להיתראות written before...
Unfortunately, Kai, you haven't been here in two years or more according to this comment, and I have no idea whether you've learned this somewhere else; but for those who pass through and see this, you and they should know that the answer is NO. The letters להת (pronounced l'hít) in להתראות are a clue that you are looking at a hitpa'el infinitive - it is reflexive. We modern Hebrew speakers use this particular word to mean "see you later" or "see you soon" but it literally means "to see oneself."
I hope this helps!
להתראות means "see you soon." Goodbye would be more literally translated as שלום. I will report this question.