So I’m looking at the language guidelines and…
The language tag always defines a language as spoken (or written,
signed or otherwise signaled) by human beings for communication of
information to other human beings. Computer languages such as
programming languages are explicitly excluded. There is no
guaranteed relationship between languages whose tags begin with the
same series of subtags; specifically, they are NOT guaranteed to be
mutually intelligible, although it will sometimes be the case that
What this says to me is that the language element pertains strictly to available language. And the thing about photographs is: there might be words in a language in them, but in this case it’s likely just names. And understanding the language someone’s name is in is not relevant to understanding the photo, most likely.
This is a rather useless element in this case.