Simplify the following text for a Grade 17 native English-speaking person.
Original: These two groups then expanded , the Eftavagarja into France , where they assimilated into the local Romani groups ( Manouches ) , and the Estraxarja into Italy and Eastern Europe , mainly what are now Croatia , Hungary , Transylvania , the Czech Republic and Slovakia , eventually adopting various regional names .
Simplified: These two groups then expanded , the Eftavagarja into France , where they are called `` Manouches '' , and the Estraxarja into Italy and Eastern Europe , mainly what are now Croatia , Slovenia , Hungary , Romania , the Czech Republic and Slovakia , eventually adopting various regional names .