It’s a sad fact, but depending on the environment that you put your characters in, any homosexual characters may need to hide the truth. In some countries, it is still illegal, while in others it might be just socially unacceptable.
Don’t assume that handicap accessibility is the same in all countries, cities, or for that matter within the same township. Different levels of standards apply and can also be interpreted differently by different builders.
The differences between regions and cultures can crop up in the most unexpected places. Take cycling for example. In New Zealand, it’s illegal to cycle without a helmet, however, in the Netherlands, cycling without a helmet is considered the norm.
When writing, ensure that the food your characters are eating for a given meal matches the meal eaten for a given culture or region. For example, breakfast in many European countries tends to be bread and cheese, whereas breakfast in the US ranges from donuts and Poptarts through to eggs and toast.
Regardless whether you drive on the left-hand-side or right-hand-side of the road, the cars are designed such that the driver is always on the side of the car that puts them closest to the middle of the road.
Reading aloud is one of the best methods that any writer/editor could have stashed under their hat. So many things can be picked up when one hears it compared to reading it. (See post for more information.)
While the Imperial measurement system is still heavily used in the US and Canada, the rest of the world uses the metric system. As a consequence, not everyone will have a concept of what an inch, foot or mile actually is.
The sun always travels from east to west, but if you are in the Northern Hemisphere, the sun travels across the sky in the south, whereas in the Southern Hemisphere, the sun travels across the sky in the north.
Normally when writing the possessive form of a word, you add an ‘s to the end. However it’s is the contraction for it is. The possessive form of it is its (no apostrophe).