Categories or tags are a different way to learn pronunciations in Forvo. We let users add them so they are creating very interesting groups of words, like these categories: Greetings, Opera or France with hundred of words in many languages.
Now we have found that there are more than 12.000 different tags and this classification was semi-hidden to you. That didn't make sense. So now you can browse the whole categories list and also filtered by language from the language profile page (i.e. japanese and japanese categories).
Hope you like this feature.