Hoi,
You make your point and you are essentially wrong. When you search in English for "beaver" you do not find beavers. They are mostly false positives related in one way or other to "beaver" but they do not depict a beaver[1] . This is true for all languages. My point is that Commons is not useful when people cannot find what they are looking for. Compare this to a search using the Wikidata labels linked to "depicts" statements in any and all languages, this is where they DO find beavers [2] (this app is by Hay Kranen and it shows the same functionality special:mediasearch used to have in a previous iteration).
I am totally aware that it is only a subset of the images at Commons that can be found in this way. It however works for a general public and it does work in any language. The current search is however not functional when you "just" want to find a picture. When you argue that special purpose files with a Spanish description are a reason not to provide a functional search, I do wonder what Commons is for. Why have the biggest freely licensed resource of media files when it has no functional search, when it is essentially closed in all languages to the public.
The reason why I aim to be a member of the board is exactly that we need a public for all the work that we have done. I do not mind when we start with a minimal service that works over a service that does not bring us the attention to Commons that it deserves. We do not truly value the data that we have.
Thanks,
GerardM