Which caveats should I be aware while localizing numbers in my front-end application ?
Example: In Brazilian Portuguese (pt-BR) we split thousands with dots and decimals with commas. In US English (en-US) that's the contrary. In pt-BR we present the digits separated by the thousands, the same as en-US. But reading about Indian English (en-IN) today I came across this gem:
The Indian numbering system is preferred for digit grouping. When written in words, or when spoken, numbers less than 100,000/100 000 are expressed just as they are in Standard English. Numbers including and beyond 100,000 / 100 000 are expressed in a subset of the Indian numbering system.
1000000 units in pt-BR are formatted 1.000.000 1000000 units in en-US are formatted 1,000,000 1000000 units in en-IN are formatted 10,00,000
Besides commas and dots and other specific separators, it seems that masking is also a valid concern.
Which other caveats should I be aware while localizing numbers in my front-end application? Specially if I'm showing numbers to non-latin character sets?