I must use PdfLaTeX to compile, so no XeLaTeX.
I have some unicode characters in the document. I want to somehow declare with a LaTeX command in the header that whenever PdfLaTeX meets a certain unicode character in my document, it replaces it with some predefined LaTeX code.
utf8 don't cover all possibilities that is why I am asking how to do this explicitly character by character.
How can I do that?