The doodles should be symbols or series of symbols and the descriptions a dictionary entry or a translation for the symbol(s).
Even if a doodle does not look like a symbol, you should still interpret it as a symbol. And sentences should be interpreted as symbols.
Emoji, your own conlang script, a historical script, an existing conlang, a painting with symbolic meaning, symbolic math function defining the description, some scribbles that look like they could be text, all ok.
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