Even better - attribute a meaning, in that language, to refusing to say anything to the next person (remaining silent). Then you can put the summation of everything they know and everything you know into the case where you don't say anything (in that language).
This is similar to making a version of gcc that outputs a Tetris program everytime it's asked to compile a 0-byte file, or maybe outputs all of Wikipedia. I mean, sure, you can hide Tetris, or the whole of human knowledge, in 0 bytes this way. But it's not a very useful exercise.
Remaining silent is as good as communicating one bit of information.
Even a 0-byte file has metadata. Even if it is 0-byte long, GCC knows that it is reading an input file. How did it come to know? Because you communicated some amount of information by initiating the compilation.
This is similar to making a version of gcc that outputs a Tetris program everytime it's asked to compile a 0-byte file, or maybe outputs all of Wikipedia. I mean, sure, you can hide Tetris, or the whole of human knowledge, in 0 bytes this way. But it's not a very useful exercise.