What language is this? ...
The evanescent subtense of the angle of contact, in all curves which at the point of contact have a finite curvature, is ultimately as the square of the subtense of the conterminous arc.
It looks and reads like english!
( This is LEMMA XI of Book I of Newton's Principia, in Motte's translation. )
Newton was a genius, but was himself rather backwards in mathematical language. We use Leibniz’s symbolism — and not Newton’s — for a reason.