A fun one to add. In Hong Kong, old walk-up buildings often have different floor numbers in English than they do in Chinese.
For example, 2/F in English may be 三楼 (third floor) in Chinese.
For example, 2/F in English may be 三楼 (third floor) in Chinese.
In a country with different cultures, languages and systems of writing it's only natural that the Chinese representation reflects what a Chinese person would call that floor, with the English representation next to it converted to whatever level of language compatibility someone might choose for international mail.