Index: gc_core/js/char_player.js
==================================================================
--- gc_core/js/char_player.js
+++ gc_core/js/char_player.js
@@ -24,10 +24,14 @@
             sRes += this._dTransChars.gl_get(c, c);
         }
         return sRes.replace("eau", "o").replace("au", "o");
     },
 
+    aVowel: new Set("aáàâäāeéèêëēiíìîïīoóòôöōuúùûüūyýỳŷÿȳœæAÁÀÂÄĀEÉÈÊËĒIÍÌÎÏĪOÓÒÔÖŌUÚÙÛÜŪYÝỲŶŸȲŒÆ"),
+    aConsonant: new Set("bcdefghjklmnñpqrstvwxzBCDEFGHJKLMNÑPQRSTVWXZ"),
+    aDouble: new Set("bcdfjklmnprstzBCDFJKLMNPRSTZ"),  // letter that may be used twice successively
+
 
     // Similar chars
 
     d1to1: new Map([
         ["1", "liîLIÎ"],
@@ -162,16 +166,22 @@
         ["C", ["CC", "SS", "QU", "CH"]],
         ["ç", ["ss", "cc", "qh", "ch"]],
         ["Ç", ["SS", "CC", "QH", "CH"]],
         ["d", ["dd",]],
         ["D", ["DD",]],
+        ["é", ["ai", "ei"]],
+        ["É", ["AI", "EI"]],
+        ["è", ["ai", "ei"]],
+        ["È", ["AI", "EI"]],
+        ["ê", ["ai", "ei"]],
+        ["Ê", ["AI", "EI"]],
+        ["ë", ["ai", "ei"]],
+        ["Ë", ["AI", "EI"]],
         ["f", ["ff", "ph"]],
         ["F", ["FF", "PH"]],
         ["g", ["gu", "ge", "gg", "gh"]],
         ["G", ["GU", "GE", "GG", "GH"]],
-        ["i", ["ii",]],
-        ["I", ["II",]],
         ["j", ["jj", "dj"]],
         ["J", ["JJ", "DJ"]],
         ["k", ["qu", "ck", "ch", "cu", "kk", "kh"]],
         ["K", ["QU", "CK", "CH", "CU", "KK", "KH"]],
         ["l", ["ll",]],

Index: gc_core/py/char_player.py
==================================================================
--- gc_core/py/char_player.py
+++ gc_core/py/char_player.py
@@ -16,10 +16,15 @@
 
 def cleanWord (sWord):
     "word simplication before calculating distance between words"
     return sWord.lower().translate(_xTransChars).replace("eau", "o").replace("au", "o")
 
+
+aVowel = set("aáàâäāeéèêëēiíìîïīoóòôöōuúùûüūyýỳŷÿȳœæAÁÀÂÄĀEÉÈÊËĒIÍÌÎÏĪOÓÒÔÖŌUÚÙÛÜŪYÝỲŶŸȲŒÆ")
+aConsonant = set("bcdefghjklmnñpqrstvwxzBCDEFGHJKLMNÑPQRSTVWXZ")
+aDouble = set("bcdfjklmnprstzBCDFJKLMNPRSTZ")  # letter that may be used twice successively
+
 
 # Similar chars
 
 d1to1 = {
     "1": "liîLIÎ",
@@ -154,16 +159,22 @@
     "C": ("CC", "SS", "QU", "CH"),
     "ç": ("ss", "cc", "qh", "ch"),
     "Ç": ("SS", "CC", "QH", "CH"),
     "d": ("dd",),
     "D": ("DD",),
+    "é": ("ai", "ei"),
+    "É": ("AI", "EI"),
+    "è": ("ai", "ei"),
+    "È": ("AI", "EI"),
+    "ê": ("ai", "ei"),
+    "Ê": ("AI", "EI"),
+    "ë": ("ai", "ei"),
+    "Ë": ("AI", "EI"),
     "f": ("ff", "ph"),
     "F": ("FF", "PH"),
     "g": ("gu", "ge", "gg", "gh"),
     "G": ("GU", "GE", "GG", "GH"),
-    "i": ("ii",),
-    "I": ("II",),
     "j": ("jj", "dj"),
     "J": ("JJ", "DJ"),
     "k": ("qu", "ck", "ch", "cu", "kk", "kh"),
     "K": ("QU", "CK", "CH", "CU", "KK", "KH"),
     "l": ("ll",),