German is the language here
Germany reads this file in German, so German is what your paper becomes. A certified translation for Germany is written from a scan while your English document stays untouched in your own hands. The finished pages carry the name, date and signature of a translator sworn before a court, which is what makes the text a record rather than a helpful note.
A title is a position, not a word
Most trouble on this route starts with one line: a job title, a rank, a course name, a grade. These look like words and behave like coordinates. They locate you inside a system of pay bands, entry rules and study years that grew up in one country and does not map onto another. Translate the word and you have moved the coordinate.
So the German set does something duller and far more useful. It keeps the English title exactly as your employer or school printed it, then adds a short German line describing the work or the study behind it. The reader gets the true label and a plain account of what it means, and nobody has to pretend two ladders are the same ladder.
What the reader in Germany is checking
The person opening your file is usually matching it against a rule they did not write. They want to see what was awarded, by whom, and when — in that order. A German title with no English original behind it stops them, because they cannot tell whether the wording came from your employer or from a translator being helpful.
That is why the gloss is written in ordinary German rather than official-sounding German. Short words, active verbs, no borrowed grandeur. If the paper says you ran a team of six for four years, that is what the German says. Anything more decorative invites the one question you do not want, which is where the extra claim came from.
Keeping your own paper
None of this needs the document itself to travel. The work is done from scans, and where the record is a birth, marriage or death entry, Sheffield Register Office issues a fresh certified copy that can stand in its place. The paper you would hate to lose then stays where it is, and the copy is the thing that gets scanned, read and quoted in the German pages.