>> I was talking with an unix language <<
Ah! I see what you mean now. The link to World/Português/Regional/Brasil is in fact a symbolic link, it's just that it doesn't look like one.
We have three ways of making links. One is the "@link", which looks just like a sub-category, but with an '@' appended to it. Another is the "relcat" (related category) which goes below the sub-categories, in a "see also" section. The third is the "altlang" (alternate language) which works like a relcat, but goes in a section marked "this category in other languages". All of these are symbolic links, but only one of them looks like a link displayed by the 'ls' command.