Aren't all spellings "made up"? All languages evolve; English more than most. Certainly the English you speak today is markedly different from the English spoken a few hundred years ago. Go back just a bit further and the English spoken then would be nearly incomprehensible by you and me.
"Ye knowe ek that in forme of speeche is chaunge
Withinne a thousand yeer, and wordes tho
That hadden pris, now wonder nyce and straunge
Us thinketh hem, and yet thei spake hem so,
And spedde as wel in love as men now do;
Ek for to wynnen love in sondry ages,
In sondry londes, sondry ben usages."
-- Geoffrey Chaucer, Troilus and Cressida
("You know also that in (the) form of speech (there) is change
Within a thousand years, and words then
That had value, now wonderfully curious and strange
(To) us they seem, and yet they spoke them so,
And succeeded as well in love as men now do;
Also to win love in sundry ages,
In sundry lands, (there) are many usages."
-- Translation by Roger Lass in "Phonology and Morphology." A History of the English Language, edited by Richard M. Hogg and David Denison. Cambridge Univ. Press, 2008)