Simplify the following text for a Grade 10 native English-speaking person.
Original: The common names of plants often vary from region to region , which is why most plant encyclopedias refer to plants using their scientific names : binomials , or `` Latin '' names .
Simplified: The common names of plants often vary from region to region , which is why most plant encyclopedias refer to plants using binomials , or `` Latin '' names .