The modern number system is of Hindu/Arabic origin, but it originally contained only nine numbers (1-9). The number zero was later invented in India by Aryabhatta at the end of the 5th Century AD… I’m wondering how they counted to 10?
Japan’s borders were closed off to foreigners for most of its history. As a result, Japan’s society is very homogeneous, composed of 98.5% ethnic Japanese, Koreans 0.5%, Chinese 0.4%, and 0.6% are other.
Switzerland does not have an official national flower, animal or motto (unofficial: One for all, all for one).
The Persians were the first people to make use of a windmill (c. 644 AD).
There are over 5,000 languages in the world. More than 500 languages are recognized in India alone. Most people in India are at least bilingual, but it is not unusual for a person to know 3 or 4 languages. Without a common language like Hindi/Urdu, or English it would be impossible for them to communicate.