The plural of radius is radii; larva, larvae; criterion, criteria.

Façade is written with a letter that doesn't exist in the English alphabet.

Fiancé and fiancée are written using diacritics, something that isn't supposed to happen in English orthography (inasmuch as English orthography might exist).

There's at least five different ways to pronounce the digraph oo, with no indication of which to use in each case, you just have to remember it.

And I could keep listing similar nonsense, but I think I've made my point.

Do not try to make sense of the English language. Therein lies madness.