Both these essays had the same score for language and that score was pretty decent.
Both used a range of vocabulary (so not just repeating the same words) and used less common lexis (minder veelvoorkomende woorden).
Both use both simple and complex grammatical forms correctly.
If there are any language errors they do NOT hinder communication. In other words, it is still easy to understand what the writer is trying to say. Errors that make it difficult to understand are worse and will lower your score more.
! In other words, making a couple of mistakes isn't bad.