„Isch han disch jän” is a Kölsch Proverb which literally means „I like you”. At first it doesn’t sound too romantic, but in fact it is a very strong declaration of affection and love – never mind if you say it to a friend, a family member or your partner. Some people even say that “isch han disch jän” is the strongest expression of emotions that a person from Cologne is capable of. So it is just the right proverb to learn for Christmas, to meet around the Christmas tree, toast and then tell each other “isch han disch jän”.
Kölsches Proverb - Xmas Edition