Yes American English is so constricting. It doesn't like Brasil, and Brasil doesn't like Brazil.
It doesn't like Americanised, but accept ZZZs all the time.
Rubbish I say.
I think we all ought to set ours to NZ English or Aussie English and really have some fun.

I set mine to British English, as they should be. If there's no such option, I usually just ignore it.

Hell, I usually ignore it anyway, and I tend to get away with it.

Spellcheckers cannot be trusted whether they're american or english! Here's yet another longer version of one of my favourite examples!...
I have a spelling checker.
It came with my pea sea.
It plane lee marks four my revue
Miss steaks aye can knot sea.

Eye ran this poem threw it,
Your sure reel glad two no.
Its vary polished in it's weigh.
My checker tolled me sew.

A checker is a bless sing,
It freeze yew lodes of thyme.
It helps me right awl stiles two reed,
And aides me when I rime.

Each frays come posed up on my screen
eye trussed too bee a joule.
The checker pours o'er every word
To cheque sum spelling rule.

Bee fore a veiling checker's Hour
spelling mite decline,
And if we're lacks oar have a laps,
We wood bee maid too wine.

Butt now bee cause my spelling
Is checked with such grate flair,
Their are no fault's with in my cite,
Of nun eye am a ware.

Now spelling does knot phase me,
It does knot bring a tier.
My pay purrs awl due glad den
With wrapped word's fare as hear.

To rite with care is quite a feet
Of witch won should be proud,
And wee mussed dew the best wee can,
Sew flaw's are knot aloud.

Sow ewe can sea why aye dew prays,
Such soft wear four pea seas,
And why eye brake in two averse
Buy righting too pleas.

A little. I disagree with a bank draught being called a 'check' when if we used 'cheque' like we used to there would be no confusion. For that matter, 'draught' would avoid confusion with 'draft.' But some spelling seem all right. 'Color' instead of 'colour' doesn't present a potential confusion.

I hear the German ones always sound like they are yelling at you.

I sometimes us the English spellings of words like behaviour, etc. But since I am USA I use the spellchecker to correct my bad spelling and keyboard errors. Nothing says you have to change the word!!!