The dropdown available for moderators to set the syntax highlighting language for tags does not include all the available language codes. These are the options I see on Stack Overflow em Português:
lang-bsh, lang-c, lang-cpp, lang-cs, lang-csh, lang-css, lang-hs, lang-html, lang-java, lang-js, lang-lisp, lang-lua, lang-ml, lang-perl, lang-php, lang-proto, lang-py, lang-rb, lang-scala, lang-sh, lang-sql, lang-vb, lang-xml, lang-vhdl
Pascal, R and Go, for example, are not included, but they're supported according to the linked meta post (and indeed work when used on inline overrides).
Could all the supported languages be included in the dropdown?