The language South Korea requires
A certified translation into Korean is required for documents used in South Korea, so an English-language record from Northern Ireland travels with a Korean version attached. A certified translation into Korean in Belfast leaves the English document exactly as it was — the Korean is a separate signed text, and nothing whatever is written onto the paper you already hold.
A document is more than its words
Look at any civil certificate and count what is not a sentence: a crest, an embossed seal, a rubber stamp with a date inside it, a registrar's signature, a serial number printed down one edge. Those elements carry as much weight with an official reader as the printed fields do, and a version that quietly omits them hands over a thinner document than the one you began with.
How the marks are recorded in Korean
The convention is description in place. Where the English sheet shows a stamp, the Korean sheet carries a bracketed note saying so, positioned where the stamp sits, with any legible wording inside it translated. Where a signature appears, it is noted as a signature. The reader ends up holding a map of the original rather than an imitation of it, which is what lets the two pages be compared line by line.
Scan quality decides how much survives
An embossed seal that leaves no ink is the classic casualty of a hurried phone photograph. Scanned flat in colour at full size it shows as a raised ring and can be described; shot at an angle in poor light it vanishes and cannot be. Where a Belfast civil record is involved, a fresh certified copy from the General Register Office for Northern Ireland (GRONI) at Colby House, Stranmillis Court, Belfast BT9 5RR gives a clean sheet to work from and leaves your own copy at home.
Cost and the calendar
Charging runs per side as issued at roughly £25, which means the back of a certificate counts even when it carries a single stamp — and that stamp is frequently the reason it has to. Standard production is 3–5 business days from the arrival of usable scans, while the 48-hour route costs more on every page, so a thick bundle rewards deciding early rather than late.