-\bind "M-Return" "break-paragraph inverse"
-\bind "C-Return" "break-line"
-\bind "C-S-L" "ligature-break-insert"
-\bind "C-space" "space-insert protected"
+\bind "M-Return" "paragraph-break inverse"
+\bind "C-Return" "newline-insert newline"
+\bind "C-S-Return" "newline-insert linebreak"
+\bind "C-S-L" "specialchar-insert ligature-break"
+\bind "C-space" "command-alternatives math-space ; space-insert protected"
+\bind "nobreakspace" "space-insert protected"