Both Uses

Old English
in
Howards End
(Edited)

It is so thoroughly Old English.
Part 17

Old English = English as it was spoken long ago
Though no more Old English than the works of Kipling, it had selected its reminiscences so adroitly that her criticism was lulled, and the guests whom it was nourishing for imperial purposes bore the outer semblance of Parson Adams or Tom Jones.
Part 17 *

Definitions:

(1) (Old English)
the earliest form of the English language -- spoken and written in England roughly from the 400s to the 1100s, and often called Anglo-Saxon

Old English looks and sounds very different from today’s English. Most modern readers can’t understand it without a translation.

It’s the language of works like Beowulf. Many people mistakenly call Shakespeare "Old English," but his plays are actually in Early Modern English, which is much closer to what we speak now.
(2) (meaning too rare to warrant focus)
Less commonly, old English can refer to anything that is old and English; and sometimes more specifically to a decorative style of a font or of furniture.