The German that Austrian offices use
German is one written language with several national standards behind it, and Austria maintains its own. The gap is small in ordinary prose and widest in precisely the vocabulary that official paperwork is built from: the names of schooling stages and their certificates, of courts and councils, of legal acts, and a handful of everyday words that took a different form there. Documents are almost entirely made of that vocabulary.
The language Austria requires
A certified translation into German in Leicester is required for a document going to Austria, and no English page is read in its place. Choosing the national standard is not an extra service layered on top; it is what writing properly in German for an Austrian reader means. A translator who ignores it produces a text that is correct in the abstract and slightly off in the room where it is used.
The signature Austria requires
Austria accepts a certified translation carried by a court-sworn translator's signature, the beeidigter Übersetzer named in German practice, dated and tied to the document it belongs with. That requirement narrows who may do the work, which is a large part of why the corridor moves at its own pace. The same person choosing the Austrian wording is the person answering for it afterwards.
Per-page cost and turnaround
The rate for an official German translation in Leicester bound for Austria is £25 a page, with 2–4 business days as standard and a 24–48 hour express route. Because the signature has to come from a holder of the sworn title, availability rather than typing speed sets the clock. Booking early is worth more here than on a route where any qualified translator could pick the file up.