Simplify the following text for a Grade 14 native English-speaking person.
Original: The term is sometimes used to refer only to protein translation but more often it refers to a multi-step process , beginning with amino acid synthesis and transcription of nuclear DNA into messenger RNA , which is then used as input to translation .
Simplified: The term is sometimes used to refer only to protein translation but more often it refers to a multi-step process , beginning with amino acid synthesis and transcription which are then used for translation .