It depends... I've seen pages in Spanish where common specific Spanish characters are shown mangled. It tends to happen on websites with older platforms, but st

It depends... I've seen pages in Spanish where common specific Spanish characters are shown mangled. It tends to happen on websites with older platforms, but still... It also often happens with pages in Chinese or Japanese. But then you bring another problem: when a document is shown as a list full of ▯▯▯▯▯▯,▯▯-.▯▯▯, there's no way to tell if the problem is with the encoding or the fonts, and no obvious way to know which font should be installed and what part of the software stack is the one responsible. The whole field of displaying documents to end users could benefit from some user-centered design to build tools that helped users to fix these situations, based on some common heuristics to solve the most frequent problems.