"She is a pretty woman."
Translation:Dia seorang perempuan yang cantik.
There are several words in Indonesian that don’t have any equivalent in English and “yang” is one of those. “Yang” can mean “that is”, “who is” or “which is” and it can be used in several ways. Let’s have a look at “yang” a bit more closely.
The first use we’ll see is when “yang” emphasises a description of a noun. You’re probaby aware that you need to add the adjective (description word) after the noun in Indonesian. For example, to say “new car” you’d use “mobil baru” – literally “car new”.
You can use “yang” to emphasise the description of the car by saying “mobil yang baru” or “car that is new”. This phrase is very slightly different from “new car” because it emphasises that the car is new.
In this case, Seorang is not necessary.
We can say "Dia perempuan cantik." (She is a beautiful woman.), "Dia perempuan yang cantik" (She is a beautiful woman.), "Dia seorang perempuan yang cantik." (She is a beautiful woman).
They are all the same. The difference is "seorang" means one person in indefinite and definite articles (such as "a woman").