Tomáš Pustelník wrote:

Hello,

I have few questions about command \installlanguage. First, in file lang-ini is command \setuplanguage for default language. It has parameters lefthyphen, righthyphen and hyphen. I would like to ask if these parameters can be used in command \installlanguage or not and what is their funcionality becouse I have tried use command:

\setuplanguage[cz][lefthyphen=@,righthyphen=@,hyphen=€]

and I didn't see any changes.

I think this is a case of NYI (not yet implemented). Luatex has support for these parameters, but it looks like mkiv only has the \setuplanguage keys at the moment, not an actual implementation.

I thought it's used to setup hyphen mark when the word is spilt at the end of line

Yes, that is wat it is supposed to do.

Also I would like to know whats the difference in \date and parameter date in \installlanguage? In parameter date in \installlanguage are curly backets,

That is just a syntax trick to solve a problem with embedded commas. In context, "key=value" and "key={value}" are equivalent, except that the second form allows embedded commas.

it's just some mask for command \date? Or those two are entirely different?

The \setuplanguage parameter provides a formatting template for \date. Best wishes, Taco