Context and Tone
Context and tone are as important as the words in any professional document. You can choose the right vocabulary, use perfect grammar and check every comma, but if the tone is wrong for the situation, the writing still doesn't work.
We do not read words in isolation. Who wrote them, who they were written for and why they were written all affect the way we understand them.
The Same Words Can Say Different Things
A short, direct answer between colleagues may be perfectly normal. The same answer to a new client could sound abrupt. A detailed explanation may be useful in a report but irritating when somebody has asked a simple question.
Neither version is necessarily good or bad English. It is the context that makes the difference.
Think About Who Is Reading
The person reading your document does not necessarily have the same knowledge, expectations or relationship with the subject that you do. A technical explanation written for a specialist can assume knowledge that would leave somebody outside the field completely lost.
Your relationship with the reader matters too. An email to someone you have worked with for ten years will naturally be different from a first approach to a potential client. A complaint, a proposal and a request for information may all involve the same people but require very different tones.
Tone Doesn't Always Translate
When you are writing in English from another language, choosing the correct words is only part of the job. A sentence that is completely ordinary in Dutch can sometimes sound unexpectedly direct in English, even when the translation itself is accurate.
The opposite can happen too. Trying too hard to make English polite can bury a simple request underneath so much careful wording that the reader is no longer quite sure what you want.
This is one of the reasons a grammatically correct translation is not always the same as natural English. The words may be right while the impression they create is not.
Purpose Changes Tone
Before deciding how something should sound, decide what the document needs to do. Are you explaining, requesting, persuading, correcting, complaining or giving someone bad news?
Clear instructions should not sound patronising. A complaint can be firm without becoming aggressive. Bad news should be handled carefully, but not so carefully that the reader has to search for the bad news.
Tone should support the purpose of the document rather than get in its way.
Correct English Is Only the Beginning
Spelling and grammar can be checked against rules. Context and tone require judgement. They depend on the reader, the situation and what you are trying to achieve.
This is also where editing can make an important difference. An editor can see when the English is technically correct but the message sounds more abrupt, formal, vague or complicated than you intended.
The words matter. So does the way the reader receives them.