I have a question about the default behavior of JavaScript's parseFloat function in different parts of the world.

In the US, if you call parseFloat on a string 123.34, you'd get a floating point number 123.34.

If I'm developing code in say Sweden or Brazil and they use a comma instead of a period as the decimal separator, does the parseFloat function expect 123,34 or 123.34.

Please note that I'm not asking how to parse a different culture's number format in the US. I'm asking does parseFloat in Sweden or Brazil behave the same way it does inside the US, or does it expect a number in its local format? Or to better think about this, does a developer in Brazil/Sweden have to convert strings to English format before it can use parseFloat after extracting text from a text box?

Please let me know if this doesn't make sense.