Yes. And to complicate things, in US schools, spelling seems to be
taught by sound of the word, and such things as 'there' 'they're', and
'their', 'know' and 'no', 'knew' and 'new', 'allowed' and 'aloud' are
all used interchangeably. It makes reading VERY difficult for those
of us who didn't learn to read that way.
I have a long list compiled from reading fanfiction of such spelling
irregularities. Yes, English is a VERY hard language to learn to use
well, and spelling is very important if meaning is to be maintained.
One can cause great confusion by using 'meat', rather than 'meet', for
instance.