diff --git a/runtime/doc/todo.txt b/runtime/doc/todo.txt
index 6159b8f..feb8e80 100644
--- a/runtime/doc/todo.txt
+++ b/runtime/doc/todo.txt
@@ -99,25 +99,25 @@
 -   Add SPELLCHECKER, with support for many languages.
     - Spell checking code todo's:
 	- Code for making suggestions:
-	  - ":mkspell" runs out of memory for Polish with utf-8.
-	  - When 'spellfile' directory doesn't exist, ask user to create it?
-	  - When 'spelllang' has more than one language only .add file of
-	    first is used?
-	  - Aspell has the "special" character, useful?
-	  - Can "the the" be added as a bad word?
-		Add BAD item in .aff file, set WF_BANNED flag.
+	  - Hebrew: also use prefixes for suggestions.  See message from
+	    Kaminsky (June 20) for ideas.
+	  - When "tn" has been marked as bad word it's sometimes still used
+	    for suggestions.  Depends on the order.
+	  - Suggestions for "t he": works well when 'spellsuggest' is "fast",
+	    not when it's "best" or "double".  Sound of "the" is "@", for "t
+	    he" it is "t h".
+	  - The sound-folding doesn't work for multi-byte characters.  It's
+	    very slow too.
 	  - Simple and fast sound-a-like: mapping list for first char and rest
 		    vowel as first char: *
 		    remove other vowels
-	  - How about words that are split over two lines?  E.g., "et al.".
-	  - When putting map string in .spl file check for duplicate chars.
-	  - Hebrew: also use prefixes for suggestions.  See message from
-	    Kaminsky (June 20) for ideas.
-	  - The sound-folding doesn't work for multi-byte characters.  It's
-	    very slow too.
+	- When 'spellfile' directory doesn't exist, ask user to create it?
+	- When 'spelllang' has more than one language only .add file of
+	  first is used?
 	- Also put list of word characters in word list file.  Otherwise the
 	  one for Italian may differ from the one used for English.
-	- Make "en-rare" spell file.
+	- Make "en-rare" spell file.  Support additional files, e.g.
+	  "medical".
 	  Convention: use en_US (language_region) and en-rare (language-field)
           Add hl groups to 'spelllang'?
 	    :set spelllang=en_us,en-rare/SpellRare,en-math/SpellMath