Don't all the comments assume you speak the language the codebase is written in? I mean I can't tell if a given PHP/C/Perl/other language I don't know well codebase is good or not. I guess there could be people that can somehow do that...
Yes, but other comments actually mention the language, and the original post was using web languages as an example, so I thought I'd save someone the trouble of clicking expecting and realizing it's not what they expected.