Your culture was absorbed into the Catran Empire. You and your forefathers were forced into slavery, raised to complete whatever task the Catran placed before you. All you have of your culture are the few stories that were managed to be passed down to you.
Slave. You have lived your life in squalor, meant to only finish tasks for your masters. Catching the attention of individuals spelt punishments and so you've learned to not draw it. Your presence is minimized and people will ignore you in public settings. Forced Servitude. You've been forced to work past your limits on multiple occasions. You have advantage on Constitution saving throws. You have disadvantage on Wisdom saving throws. Faded History. You have advantage on any check pertaining to your culture.