Simplify the following text for a Grade 5 native English-speaking person.
Original: Being the primary language of the Lao people , Lao is also an important second language for the multitude of ethnic groups in Laos and in Isan . Lao , like all languages in Laos , is written in an abugida script .
Simplified: The Lao script ( Tua Lao ) has roots in the Brahmic script from India .