Your solution with using | as a separator is probably the neatest for entering the data.
This, however, stood out to me:
You can give multiple pieces of content to a function with the following syntax which does not need ,.
//This
#braille[⠾⠃][⠚⠔⠏⠲][⠋⠓⠓⠛⠄][⠤⠚⠔⠏][⠲⠎⠑⠁][⠉⠻⠐][⠤⠚⠒⠂]
//is equivalent to
#braille([⠾⠃], [⠚⠔⠏⠲], [⠋⠓⠓⠛⠄], [⠤⠚⠔⠏], [⠲⠎⠑⠁], [⠉⠻⠐], [⠤⠚⠒⠂])