Collation URIs for the Unicode Collation Algorithm are implemented using the ICU4N library, which is not as complete as its Java counterpart, ICU4J.

Localization of dates (specifically, month names and day-of-the-week names for different languages, as requested using format-date()) is implemented from SaxonCS 11.1. The data is obtained from the .NET platform interfaces: CultureInfo.DateTimeFormatInfo.

Spelled-out formatting of numbers ("one", "two", "three"), which can be requested using xsl:number, format-integer(), or format-date(), is not available for languages other than English. (We have not been able to find a .NET library that provides this capability).

For more general information about these localization features, see the Localization section.