foo$"bar" is a translated_string not a bare $ followed by string

[verhovsky]

foo$"bar"

Expected:

program [0, 3] - [1, 0]
  command [0, 3] - [0, 9]
    name: command_name [0, 3] - [0, 9]
      concatenation [0, 0] - [0, 9]
        word [0, 0] - [0, 3]
        translated_string [0, 3] - [0, 9]
          string [0, 4] - [0, 9]
            string_content [0, 5] - [0, 8]

Actual:

program [0, 0] - [1, 0]
  command [0, 0] - [0, 9]
    name: command_name [0, 0] - [0, 9]
      concatenation [0, 0] - [0, 9]
        word [0, 0] - [0, 3]
        string [0, 4] - [0, 9]
          string_content [0, 5] - [0, 8]

as you can see with Bash 5.2.26

$ echo foo$"bar"
foobar
$ echo $"bar"
bar