Imagine an interface that would allow you to enter your phone number without any problems. Now imagine the complete opposite. In this humorous Good Read Fabricio Teixeira provides examples of sinister phone number input formats. Link
Websites and apps are increasingly being used by consumers all over the world, but one design is not appropriate for all groups of people. Factors such as wording, orientation, and color need to be considered when designing an interface that will be viewed by people of different cultures.