I use LaTeX (in detail I use pdflatex from MikTeX) for automatically generating documents based on data gathered from the Internet. Of course this means that those pages can contain small parts of other languages such as Chinese, Korean, Arabic, Turkish, ...
Therefore I don't know what languages are used and where they are used within my document.
Until now I have replace all characters from foreign languages by a dot to avoid problems, but in some situations e.g. company names then end up as
..... instead of some Chinese characters.
Is it possible to build one LaTeX document that allows all available languages or at least a large set of languages?
If it is possible how do I know what Unicode characters are supported in this document and which not so I can filter them before generating the .tex sources?