It is Yiddish but very difficult to read because of some characters associated with numbers. Seems to be sent to a sister Ruchl Leah. The son Itzhak is 17 years old.
For memory to my dear sister Rachel Leah this is my son Yitzchok who is turning 17 years old till 120 years old (here the handwriting turns sloppy and I can't decipher the rest of the text) signed your brother AvrahamÂ
Looking for a translation for this postcard. Believe these young men are my Ticotsky ancestors. Maybe Yiddish or Polish? Thank you.