"My uncle and aunt are from Delhi."

Translation: मेरे चाचा और चाची दिल्ली से हैं।

[SaranshKejriwal]

Hindi differentiates between types of uncles...chacha is paternal uncle and mama is maternal uncle. I hope Duolingo would be able to capture this

[SowmyaVenu]

Mama and mami must also be accepted

[didiwhereareyou]

It is also accepted to write 'chacha chachi' and is 'chacha aur chachi'