multibyte characters are enabled, you can use any of the non-ASCII
printing characters that Emacs supports. They have character codes
starting at 256, octal 0400, and each one is represented as a sequence
-of two or more bytes. @xref{International}.
+of two or more bytes. @xref{International}. Single byte characters
+with codes 128 through 255 may also appear in multibyte buffers.
If you disable multibyte characters, then you can use only one
alphabet of non-ASCII characters, but they all fit in one byte. They