From a general discovery POV, it seems like this case could be handled with a query rather than vocabulary. For example:
:instance1 :inLanguage ?bcp47;
:author ?author .
?author :name ?authorName .
FILTER(LANG(?authorName) = ?bcp47)
I don't know if BIBFRAME is currently recommending BCP47 to describe the language of material, but it's worth considering.
> On Jul 3, 2016, at 7:56 PM, Kučera Jan <[log in to unmask]> wrote:
> in a bibframe catalogue entry, can I link to an existing authority but specify the particular text used in an instance? (for example, if the author is written in different language or script)
> Or is there a similar equivalent for author as work->instance?