"Thanks a lot, good night."
Translation:תודה רבה, לילה טוב.
The english translation does not show the לכן ! In english : to you. How can I know that I have to add it in hebrew ?
another correct solution is listed as תודה רבה לכם לילה טוב. wouldn't this be more like "thanks a lot to you, good night"?
It's a very formal construction - you would use it in very formal situations or where there may be confusion as to whom you are thanking.
the לכן part was never taught, how was i supposed to know what it even means?
Duolingo teaches words in the context of phrases. You can report if the hover isn't working.
Duolingo should include a speech speed slider. Not everyone can hear correctly at the spoken speed.