Using iPhone 4s. In settings > general > keyboard I have a British keyboard, and no other keyboards. In settings > general > international I have region format set to UK and language set to British English.
Yet many apps seem to ignore that. EG the stack exchange app will highlight colour but not color; apps highlight programme (eg tv programme not computer program). There's a bunch of -ise / -ize suffixes that get mangled.
How do I fix this?