Language-specific web editors often do. I think Uiua (https://www.uiua.org/ https://www.uiua.org/) is the state of the art here, with the minor issue that most

Language-specific web editors often do. I think Uiua (https://www.uiua.org/ https://www.uiua.org/) is the state of the art here, with the minor issue that most of the symbols aren't used in any other language. Several APL-likes have language bars at the top, with names shown on hover. - Dyalog APL: https://tryapl.org/ https://tryapl.org/ - Kap: https://kapdemo.dhsdevelopments.com/clientweb2/ https://kapdemo.dhsdevelopments.com/clientweb2/ - ngn/apl: https://abrudz.github.io/ngn-apl/web/ https://abrudz.github.io/ngn-apl/web/ - BQN (my language): https://bqn.funmaker.moe/ https://bqn.funmaker.moe/