Am 01.06.2011 um 09:45 schrieb Jeong Dalyoung:
> I summerize it as a test file. The first 5 methods are working well, but the
> last one using \noexpand cause the error.
What exactly do you plan to do with the language check, for simple texts your
method is overkill and labeltexts are better suited, even a command which
prints a text can be written in TeX without problems:
\def\LangOne
{\doifelse{\currentmainlanguage}{en}
{English 1}
{\doifelse{\currentmainlanguage}{nl}
{Dutch 1}
{Unknown 1}}}
\def\LangTwo
{\processaction
[\currentmainlanguage]
[ en=>English 2,
nl=>Dutch 2,
unknown=>Unknown 2]}
\setuplabeltext[en][langthree=English 3]
\setuplabeltext[nl][langthree=Dutch 3]
\setuplabeltext [langthree=Unknown 3]
\starttext
\LangOne:\LangTwo:\labeltext{langthree}:\translate[en=English 4,nl=Dutch 4]
\mainlanguage[nl]
\LangOne:\LangTwo:\labeltext{langthree}:\translate[en=English 4,nl=Dutch 4]
\mainlanguage[fr]
\LangOne:\LangTwo:\labeltext{langthree}:\translate[en=English 4,nl=Dutch 4]
\stoptext
Wolfgang
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