Simplify the following text for a Grade 11 native English-speaking person.
Original: Tamil Jains and Kannada Jains who are native to their regions , residing in Tamil Nadu and Karnataka respectively since 1st century BCE , are distinguishable from North Indian Jains in some of their routines and practices , but the core philosophies and belief systems are the same for all Jain communities .
Simplified: Tamil Jains and Tulu Jains who are native to their region residing in places of TamilNadu and Karnataka early since 1st century BC . Even though South Indian Jains are distinguishable in some of their routines and practices from North Indian Jains , the core philosophies and belief systems are the same for both cultures .