Calc-file-open->fields- standard/US english

Hello!
Please, If i import a document using fiel- open-
then I get option FIELDS where I have to choose for each column being f.e. standard or US english etc.
Please, what is standard and what is US english ment for?
Many thanks!

What kind of file are you open?. Is it a CSV file?

Select the type of the columns depends on how the data are in the file, and what are your locale settings.

E.g. if decimal point is a dot in the file and your local is with comma, then there is needed to select US English.

Click the help to know more about it.