Re: morse code, Braille, sign language etc.
My feeling is that there may be examples of any and/or all of the above, and maybe other types of language (Esperanto? Flag language?), and that they provide ADDITIONAL clues that can help with the identification of the sanctuary, a location, etc.
However, all of those are a "special knowledge" of some sort, so I'm operating under the assumption they are not REQUIRED to find the tokens. They give added clues if you know that language, but the primary way to find the tokens does not involve them.
Gemini