[NTG-context] Can I use language as a mode (set on the command line) and simplify this?

[Wolfgang Schuster]

Pablo Rodriguez via ntg-context schrieb am 11.05.2022 um 17:57:
> AfaIk, there is not "--language" option from the command line. (This
> also makes sense to me.)

\doifdocumentargument {language}
   {\mainlanguage[\getdocumentargument{language}]}

\starttext
\currentmainlanguage
\stoptext

Wolfgang