No, there is no clear boundary between text and icons. What is included in Unicode and in what way is decided case by case. See for example the regional indicat

No, there is no clear boundary between text and icons. What is included in Unicode and in what way is decided case by case. See for example the regional indicator symbols.[1] Always two of them indicate a particular country code according to ISO 3166-1.[2] They resolve into a sort of a logo: the flag of the country. (Guess what happens with rendering a legacy Unicode document, when a country changes its flag ...) [1] https://en.wikipedia.org/wiki/Regional_indicator_symbol https://en.wikipedia.org/wiki/Regional_indicator_symbol [2] https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2 https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2