diff --git a/java/src/com/android/inputmethod/latin/ExpandableDictionary.java b/java/src/com/android/inputmethod/latin/ExpandableDictionary.java
index 7a740b3f1..dd9c57e0c 100644
--- a/java/src/com/android/inputmethod/latin/ExpandableDictionary.java
+++ b/java/src/com/android/inputmethod/latin/ExpandableDictionary.java
@@ -261,6 +261,28 @@ public class ExpandableDictionary extends Dictionary {
         return (node == null) ? false : !node.mShortcutOnly;
     }
 
+    protected boolean removeBigram(String word1, String word2) {
+        // Refer to addOrSetBigram() about word1.toLowerCase()
+        final Node firstWord = searchWord(mRoots, word1.toLowerCase(), 0, null);
+        final Node secondWord = searchWord(mRoots, word2, 0, null);
+        LinkedList<NextWord> bigram = firstWord.mNGrams;
+        NextWord bigramNode = null;
+        if (bigram == null || bigram.size() == 0) {
+            return false;
+        } else {
+            for (NextWord nw : bigram) {
+                if (nw.mWord == secondWord) {
+                    bigramNode = nw;
+                    break;
+                }
+            }
+        }
+        if (bigramNode == null) {
+            return false;
+        }
+        return bigram.remove(bigramNode);
+    }
+
     /**
      * Returns the word's frequency or -1 if not found
      */
@@ -639,167 +661,167 @@ public class ExpandableDictionary extends Dictionary {
      * is combined.
      */
     private static final char BASE_CHARS[] = {
-        0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 
-        0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f, 
-        0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017, 
-        0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f, 
-        0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027, 
-        0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f, 
-        0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, 
-        0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f, 
-        0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, 
-        0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f, 
-        0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, 
-        0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f, 
-        0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067, 
-        0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f, 
-        0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077, 
-        0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x007f, 
-        0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087, 
-        0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f, 
-        0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097, 
-        0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f, 
-        0x0020, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7, 
-        0x0020, 0x00a9, 0x0061, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x0020, 
-        0x00b0, 0x00b1, 0x0032, 0x0033, 0x0020, 0x03bc, 0x00b6, 0x00b7, 
-        0x0020, 0x0031, 0x006f, 0x00bb, 0x0031, 0x0031, 0x0033, 0x00bf, 
-        0x0041, 0x0041, 0x0041, 0x0041, 0x0041, 0x0041, 0x00c6, 0x0043, 
-        0x0045, 0x0045, 0x0045, 0x0045, 0x0049, 0x0049, 0x0049, 0x0049, 
-        0x00d0, 0x004e, 0x004f, 0x004f, 0x004f, 0x004f, 0x004f, 0x00d7, 
+        0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
+        0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,
+        0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017,
+        0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f,
+        0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
+        0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f,
+        0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
+        0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
+        0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
+        0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
+        0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
+        0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
+        0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
+        0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f,
+        0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
+        0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x007f,
+        0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087,
+        0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f,
+        0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
+        0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f,
+        0x0020, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7,
+        0x0020, 0x00a9, 0x0061, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x0020,
+        0x00b0, 0x00b1, 0x0032, 0x0033, 0x0020, 0x03bc, 0x00b6, 0x00b7,
+        0x0020, 0x0031, 0x006f, 0x00bb, 0x0031, 0x0031, 0x0033, 0x00bf,
+        0x0041, 0x0041, 0x0041, 0x0041, 0x0041, 0x0041, 0x00c6, 0x0043,
+        0x0045, 0x0045, 0x0045, 0x0045, 0x0049, 0x0049, 0x0049, 0x0049,
+        0x00d0, 0x004e, 0x004f, 0x004f, 0x004f, 0x004f, 0x004f, 0x00d7,
         0x004f, 0x0055, 0x0055, 0x0055, 0x0055, 0x0059, 0x00de, 0x0073, // Manually changed d8 to 4f
                                                                         // Manually changed df to 73
-        0x0061, 0x0061, 0x0061, 0x0061, 0x0061, 0x0061, 0x00e6, 0x0063, 
-        0x0065, 0x0065, 0x0065, 0x0065, 0x0069, 0x0069, 0x0069, 0x0069, 
-        0x00f0, 0x006e, 0x006f, 0x006f, 0x006f, 0x006f, 0x006f, 0x00f7, 
+        0x0061, 0x0061, 0x0061, 0x0061, 0x0061, 0x0061, 0x00e6, 0x0063,
+        0x0065, 0x0065, 0x0065, 0x0065, 0x0069, 0x0069, 0x0069, 0x0069,
+        0x00f0, 0x006e, 0x006f, 0x006f, 0x006f, 0x006f, 0x006f, 0x00f7,
         0x006f, 0x0075, 0x0075, 0x0075, 0x0075, 0x0079, 0x00fe, 0x0079, // Manually changed f8 to 6f
-        0x0041, 0x0061, 0x0041, 0x0061, 0x0041, 0x0061, 0x0043, 0x0063, 
-        0x0043, 0x0063, 0x0043, 0x0063, 0x0043, 0x0063, 0x0044, 0x0064, 
-        0x0110, 0x0111, 0x0045, 0x0065, 0x0045, 0x0065, 0x0045, 0x0065, 
-        0x0045, 0x0065, 0x0045, 0x0065, 0x0047, 0x0067, 0x0047, 0x0067, 
-        0x0047, 0x0067, 0x0047, 0x0067, 0x0048, 0x0068, 0x0126, 0x0127, 
-        0x0049, 0x0069, 0x0049, 0x0069, 0x0049, 0x0069, 0x0049, 0x0069, 
-        0x0049, 0x0131, 0x0049, 0x0069, 0x004a, 0x006a, 0x004b, 0x006b, 
-        0x0138, 0x004c, 0x006c, 0x004c, 0x006c, 0x004c, 0x006c, 0x004c, 
-        0x006c, 0x0141, 0x0142, 0x004e, 0x006e, 0x004e, 0x006e, 0x004e, 
-        0x006e, 0x02bc, 0x014a, 0x014b, 0x004f, 0x006f, 0x004f, 0x006f, 
-        0x004f, 0x006f, 0x0152, 0x0153, 0x0052, 0x0072, 0x0052, 0x0072, 
-        0x0052, 0x0072, 0x0053, 0x0073, 0x0053, 0x0073, 0x0053, 0x0073, 
-        0x0053, 0x0073, 0x0054, 0x0074, 0x0054, 0x0074, 0x0166, 0x0167, 
-        0x0055, 0x0075, 0x0055, 0x0075, 0x0055, 0x0075, 0x0055, 0x0075, 
-        0x0055, 0x0075, 0x0055, 0x0075, 0x0057, 0x0077, 0x0059, 0x0079, 
-        0x0059, 0x005a, 0x007a, 0x005a, 0x007a, 0x005a, 0x007a, 0x0073, 
-        0x0180, 0x0181, 0x0182, 0x0183, 0x0184, 0x0185, 0x0186, 0x0187, 
-        0x0188, 0x0189, 0x018a, 0x018b, 0x018c, 0x018d, 0x018e, 0x018f, 
-        0x0190, 0x0191, 0x0192, 0x0193, 0x0194, 0x0195, 0x0196, 0x0197, 
-        0x0198, 0x0199, 0x019a, 0x019b, 0x019c, 0x019d, 0x019e, 0x019f, 
-        0x004f, 0x006f, 0x01a2, 0x01a3, 0x01a4, 0x01a5, 0x01a6, 0x01a7, 
-        0x01a8, 0x01a9, 0x01aa, 0x01ab, 0x01ac, 0x01ad, 0x01ae, 0x0055, 
-        0x0075, 0x01b1, 0x01b2, 0x01b3, 0x01b4, 0x01b5, 0x01b6, 0x01b7, 
-        0x01b8, 0x01b9, 0x01ba, 0x01bb, 0x01bc, 0x01bd, 0x01be, 0x01bf, 
-        0x01c0, 0x01c1, 0x01c2, 0x01c3, 0x0044, 0x0044, 0x0064, 0x004c, 
-        0x004c, 0x006c, 0x004e, 0x004e, 0x006e, 0x0041, 0x0061, 0x0049, 
-        0x0069, 0x004f, 0x006f, 0x0055, 0x0075, 0x00dc, 0x00fc, 0x00dc, 
-        0x00fc, 0x00dc, 0x00fc, 0x00dc, 0x00fc, 0x01dd, 0x00c4, 0x00e4, 
-        0x0226, 0x0227, 0x00c6, 0x00e6, 0x01e4, 0x01e5, 0x0047, 0x0067, 
-        0x004b, 0x006b, 0x004f, 0x006f, 0x01ea, 0x01eb, 0x01b7, 0x0292, 
-        0x006a, 0x0044, 0x0044, 0x0064, 0x0047, 0x0067, 0x01f6, 0x01f7, 
-        0x004e, 0x006e, 0x00c5, 0x00e5, 0x00c6, 0x00e6, 0x00d8, 0x00f8, 
-        0x0041, 0x0061, 0x0041, 0x0061, 0x0045, 0x0065, 0x0045, 0x0065, 
-        0x0049, 0x0069, 0x0049, 0x0069, 0x004f, 0x006f, 0x004f, 0x006f, 
-        0x0052, 0x0072, 0x0052, 0x0072, 0x0055, 0x0075, 0x0055, 0x0075, 
-        0x0053, 0x0073, 0x0054, 0x0074, 0x021c, 0x021d, 0x0048, 0x0068, 
-        0x0220, 0x0221, 0x0222, 0x0223, 0x0224, 0x0225, 0x0041, 0x0061, 
-        0x0045, 0x0065, 0x00d6, 0x00f6, 0x00d5, 0x00f5, 0x004f, 0x006f, 
-        0x022e, 0x022f, 0x0059, 0x0079, 0x0234, 0x0235, 0x0236, 0x0237, 
-        0x0238, 0x0239, 0x023a, 0x023b, 0x023c, 0x023d, 0x023e, 0x023f, 
-        0x0240, 0x0241, 0x0242, 0x0243, 0x0244, 0x0245, 0x0246, 0x0247, 
-        0x0248, 0x0249, 0x024a, 0x024b, 0x024c, 0x024d, 0x024e, 0x024f, 
-        0x0250, 0x0251, 0x0252, 0x0253, 0x0254, 0x0255, 0x0256, 0x0257, 
-        0x0258, 0x0259, 0x025a, 0x025b, 0x025c, 0x025d, 0x025e, 0x025f, 
-        0x0260, 0x0261, 0x0262, 0x0263, 0x0264, 0x0265, 0x0266, 0x0267, 
-        0x0268, 0x0269, 0x026a, 0x026b, 0x026c, 0x026d, 0x026e, 0x026f, 
-        0x0270, 0x0271, 0x0272, 0x0273, 0x0274, 0x0275, 0x0276, 0x0277, 
-        0x0278, 0x0279, 0x027a, 0x027b, 0x027c, 0x027d, 0x027e, 0x027f, 
-        0x0280, 0x0281, 0x0282, 0x0283, 0x0284, 0x0285, 0x0286, 0x0287, 
-        0x0288, 0x0289, 0x028a, 0x028b, 0x028c, 0x028d, 0x028e, 0x028f, 
-        0x0290, 0x0291, 0x0292, 0x0293, 0x0294, 0x0295, 0x0296, 0x0297, 
-        0x0298, 0x0299, 0x029a, 0x029b, 0x029c, 0x029d, 0x029e, 0x029f, 
-        0x02a0, 0x02a1, 0x02a2, 0x02a3, 0x02a4, 0x02a5, 0x02a6, 0x02a7, 
-        0x02a8, 0x02a9, 0x02aa, 0x02ab, 0x02ac, 0x02ad, 0x02ae, 0x02af, 
-        0x0068, 0x0266, 0x006a, 0x0072, 0x0279, 0x027b, 0x0281, 0x0077, 
-        0x0079, 0x02b9, 0x02ba, 0x02bb, 0x02bc, 0x02bd, 0x02be, 0x02bf, 
-        0x02c0, 0x02c1, 0x02c2, 0x02c3, 0x02c4, 0x02c5, 0x02c6, 0x02c7, 
-        0x02c8, 0x02c9, 0x02ca, 0x02cb, 0x02cc, 0x02cd, 0x02ce, 0x02cf, 
-        0x02d0, 0x02d1, 0x02d2, 0x02d3, 0x02d4, 0x02d5, 0x02d6, 0x02d7, 
-        0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x02de, 0x02df, 
-        0x0263, 0x006c, 0x0073, 0x0078, 0x0295, 0x02e5, 0x02e6, 0x02e7, 
-        0x02e8, 0x02e9, 0x02ea, 0x02eb, 0x02ec, 0x02ed, 0x02ee, 0x02ef, 
-        0x02f0, 0x02f1, 0x02f2, 0x02f3, 0x02f4, 0x02f5, 0x02f6, 0x02f7, 
-        0x02f8, 0x02f9, 0x02fa, 0x02fb, 0x02fc, 0x02fd, 0x02fe, 0x02ff, 
-        0x0300, 0x0301, 0x0302, 0x0303, 0x0304, 0x0305, 0x0306, 0x0307, 
-        0x0308, 0x0309, 0x030a, 0x030b, 0x030c, 0x030d, 0x030e, 0x030f, 
-        0x0310, 0x0311, 0x0312, 0x0313, 0x0314, 0x0315, 0x0316, 0x0317, 
-        0x0318, 0x0319, 0x031a, 0x031b, 0x031c, 0x031d, 0x031e, 0x031f, 
-        0x0320, 0x0321, 0x0322, 0x0323, 0x0324, 0x0325, 0x0326, 0x0327, 
-        0x0328, 0x0329, 0x032a, 0x032b, 0x032c, 0x032d, 0x032e, 0x032f, 
-        0x0330, 0x0331, 0x0332, 0x0333, 0x0334, 0x0335, 0x0336, 0x0337, 
-        0x0338, 0x0339, 0x033a, 0x033b, 0x033c, 0x033d, 0x033e, 0x033f, 
-        0x0300, 0x0301, 0x0342, 0x0313, 0x0308, 0x0345, 0x0346, 0x0347, 
-        0x0348, 0x0349, 0x034a, 0x034b, 0x034c, 0x034d, 0x034e, 0x034f, 
-        0x0350, 0x0351, 0x0352, 0x0353, 0x0354, 0x0355, 0x0356, 0x0357, 
-        0x0358, 0x0359, 0x035a, 0x035b, 0x035c, 0x035d, 0x035e, 0x035f, 
-        0x0360, 0x0361, 0x0362, 0x0363, 0x0364, 0x0365, 0x0366, 0x0367, 
-        0x0368, 0x0369, 0x036a, 0x036b, 0x036c, 0x036d, 0x036e, 0x036f, 
-        0x0370, 0x0371, 0x0372, 0x0373, 0x02b9, 0x0375, 0x0376, 0x0377, 
-        0x0378, 0x0379, 0x0020, 0x037b, 0x037c, 0x037d, 0x003b, 0x037f, 
-        0x0380, 0x0381, 0x0382, 0x0383, 0x0020, 0x00a8, 0x0391, 0x00b7, 
-        0x0395, 0x0397, 0x0399, 0x038b, 0x039f, 0x038d, 0x03a5, 0x03a9, 
-        0x03ca, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396, 0x0397, 
-        0x0398, 0x0399, 0x039a, 0x039b, 0x039c, 0x039d, 0x039e, 0x039f, 
-        0x03a0, 0x03a1, 0x03a2, 0x03a3, 0x03a4, 0x03a5, 0x03a6, 0x03a7, 
-        0x03a8, 0x03a9, 0x0399, 0x03a5, 0x03b1, 0x03b5, 0x03b7, 0x03b9, 
-        0x03cb, 0x03b1, 0x03b2, 0x03b3, 0x03b4, 0x03b5, 0x03b6, 0x03b7, 
-        0x03b8, 0x03b9, 0x03ba, 0x03bb, 0x03bc, 0x03bd, 0x03be, 0x03bf, 
-        0x03c0, 0x03c1, 0x03c2, 0x03c3, 0x03c4, 0x03c5, 0x03c6, 0x03c7, 
-        0x03c8, 0x03c9, 0x03b9, 0x03c5, 0x03bf, 0x03c5, 0x03c9, 0x03cf, 
-        0x03b2, 0x03b8, 0x03a5, 0x03d2, 0x03d2, 0x03c6, 0x03c0, 0x03d7, 
-        0x03d8, 0x03d9, 0x03da, 0x03db, 0x03dc, 0x03dd, 0x03de, 0x03df, 
-        0x03e0, 0x03e1, 0x03e2, 0x03e3, 0x03e4, 0x03e5, 0x03e6, 0x03e7, 
-        0x03e8, 0x03e9, 0x03ea, 0x03eb, 0x03ec, 0x03ed, 0x03ee, 0x03ef, 
-        0x03ba, 0x03c1, 0x03c2, 0x03f3, 0x0398, 0x03b5, 0x03f6, 0x03f7, 
-        0x03f8, 0x03a3, 0x03fa, 0x03fb, 0x03fc, 0x03fd, 0x03fe, 0x03ff, 
-        0x0415, 0x0415, 0x0402, 0x0413, 0x0404, 0x0405, 0x0406, 0x0406, 
-        0x0408, 0x0409, 0x040a, 0x040b, 0x041a, 0x0418, 0x0423, 0x040f, 
-        0x0410, 0x0411, 0x0412, 0x0413, 0x0414, 0x0415, 0x0416, 0x0417, 
-        0x0418, 0x0418, 0x041a, 0x041b, 0x041c, 0x041d, 0x041e, 0x041f, 
-        0x0420, 0x0421, 0x0422, 0x0423, 0x0424, 0x0425, 0x0426, 0x0427, 
-        0x0428, 0x0429, 0x042a, 0x042b, 0x042c, 0x042d, 0x042e, 0x042f, 
-        0x0430, 0x0431, 0x0432, 0x0433, 0x0434, 0x0435, 0x0436, 0x0437, 
-        0x0438, 0x0438, 0x043a, 0x043b, 0x043c, 0x043d, 0x043e, 0x043f, 
-        0x0440, 0x0441, 0x0442, 0x0443, 0x0444, 0x0445, 0x0446, 0x0447, 
-        0x0448, 0x0449, 0x044a, 0x044b, 0x044c, 0x044d, 0x044e, 0x044f, 
-        0x0435, 0x0435, 0x0452, 0x0433, 0x0454, 0x0455, 0x0456, 0x0456, 
-        0x0458, 0x0459, 0x045a, 0x045b, 0x043a, 0x0438, 0x0443, 0x045f, 
-        0x0460, 0x0461, 0x0462, 0x0463, 0x0464, 0x0465, 0x0466, 0x0467, 
-        0x0468, 0x0469, 0x046a, 0x046b, 0x046c, 0x046d, 0x046e, 0x046f, 
-        0x0470, 0x0471, 0x0472, 0x0473, 0x0474, 0x0475, 0x0474, 0x0475, 
-        0x0478, 0x0479, 0x047a, 0x047b, 0x047c, 0x047d, 0x047e, 0x047f, 
-        0x0480, 0x0481, 0x0482, 0x0483, 0x0484, 0x0485, 0x0486, 0x0487, 
-        0x0488, 0x0489, 0x048a, 0x048b, 0x048c, 0x048d, 0x048e, 0x048f, 
-        0x0490, 0x0491, 0x0492, 0x0493, 0x0494, 0x0495, 0x0496, 0x0497, 
-        0x0498, 0x0499, 0x049a, 0x049b, 0x049c, 0x049d, 0x049e, 0x049f, 
-        0x04a0, 0x04a1, 0x04a2, 0x04a3, 0x04a4, 0x04a5, 0x04a6, 0x04a7, 
-        0x04a8, 0x04a9, 0x04aa, 0x04ab, 0x04ac, 0x04ad, 0x04ae, 0x04af, 
-        0x04b0, 0x04b1, 0x04b2, 0x04b3, 0x04b4, 0x04b5, 0x04b6, 0x04b7, 
-        0x04b8, 0x04b9, 0x04ba, 0x04bb, 0x04bc, 0x04bd, 0x04be, 0x04bf, 
-        0x04c0, 0x0416, 0x0436, 0x04c3, 0x04c4, 0x04c5, 0x04c6, 0x04c7, 
-        0x04c8, 0x04c9, 0x04ca, 0x04cb, 0x04cc, 0x04cd, 0x04ce, 0x04cf, 
-        0x0410, 0x0430, 0x0410, 0x0430, 0x04d4, 0x04d5, 0x0415, 0x0435, 
-        0x04d8, 0x04d9, 0x04d8, 0x04d9, 0x0416, 0x0436, 0x0417, 0x0437, 
-        0x04e0, 0x04e1, 0x0418, 0x0438, 0x0418, 0x0438, 0x041e, 0x043e, 
-        0x04e8, 0x04e9, 0x04e8, 0x04e9, 0x042d, 0x044d, 0x0423, 0x0443, 
-        0x0423, 0x0443, 0x0423, 0x0443, 0x0427, 0x0447, 0x04f6, 0x04f7, 
-        0x042b, 0x044b, 0x04fa, 0x04fb, 0x04fc, 0x04fd, 0x04fe, 0x04ff, 
+        0x0041, 0x0061, 0x0041, 0x0061, 0x0041, 0x0061, 0x0043, 0x0063,
+        0x0043, 0x0063, 0x0043, 0x0063, 0x0043, 0x0063, 0x0044, 0x0064,
+        0x0110, 0x0111, 0x0045, 0x0065, 0x0045, 0x0065, 0x0045, 0x0065,
+        0x0045, 0x0065, 0x0045, 0x0065, 0x0047, 0x0067, 0x0047, 0x0067,
+        0x0047, 0x0067, 0x0047, 0x0067, 0x0048, 0x0068, 0x0126, 0x0127,
+        0x0049, 0x0069, 0x0049, 0x0069, 0x0049, 0x0069, 0x0049, 0x0069,
+        0x0049, 0x0131, 0x0049, 0x0069, 0x004a, 0x006a, 0x004b, 0x006b,
+        0x0138, 0x004c, 0x006c, 0x004c, 0x006c, 0x004c, 0x006c, 0x004c,
+        0x006c, 0x0141, 0x0142, 0x004e, 0x006e, 0x004e, 0x006e, 0x004e,
+        0x006e, 0x02bc, 0x014a, 0x014b, 0x004f, 0x006f, 0x004f, 0x006f,
+        0x004f, 0x006f, 0x0152, 0x0153, 0x0052, 0x0072, 0x0052, 0x0072,
+        0x0052, 0x0072, 0x0053, 0x0073, 0x0053, 0x0073, 0x0053, 0x0073,
+        0x0053, 0x0073, 0x0054, 0x0074, 0x0054, 0x0074, 0x0166, 0x0167,
+        0x0055, 0x0075, 0x0055, 0x0075, 0x0055, 0x0075, 0x0055, 0x0075,
+        0x0055, 0x0075, 0x0055, 0x0075, 0x0057, 0x0077, 0x0059, 0x0079,
+        0x0059, 0x005a, 0x007a, 0x005a, 0x007a, 0x005a, 0x007a, 0x0073,
+        0x0180, 0x0181, 0x0182, 0x0183, 0x0184, 0x0185, 0x0186, 0x0187,
+        0x0188, 0x0189, 0x018a, 0x018b, 0x018c, 0x018d, 0x018e, 0x018f,
+        0x0190, 0x0191, 0x0192, 0x0193, 0x0194, 0x0195, 0x0196, 0x0197,
+        0x0198, 0x0199, 0x019a, 0x019b, 0x019c, 0x019d, 0x019e, 0x019f,
+        0x004f, 0x006f, 0x01a2, 0x01a3, 0x01a4, 0x01a5, 0x01a6, 0x01a7,
+        0x01a8, 0x01a9, 0x01aa, 0x01ab, 0x01ac, 0x01ad, 0x01ae, 0x0055,
+        0x0075, 0x01b1, 0x01b2, 0x01b3, 0x01b4, 0x01b5, 0x01b6, 0x01b7,
+        0x01b8, 0x01b9, 0x01ba, 0x01bb, 0x01bc, 0x01bd, 0x01be, 0x01bf,
+        0x01c0, 0x01c1, 0x01c2, 0x01c3, 0x0044, 0x0044, 0x0064, 0x004c,
+        0x004c, 0x006c, 0x004e, 0x004e, 0x006e, 0x0041, 0x0061, 0x0049,
+        0x0069, 0x004f, 0x006f, 0x0055, 0x0075, 0x00dc, 0x00fc, 0x00dc,
+        0x00fc, 0x00dc, 0x00fc, 0x00dc, 0x00fc, 0x01dd, 0x00c4, 0x00e4,
+        0x0226, 0x0227, 0x00c6, 0x00e6, 0x01e4, 0x01e5, 0x0047, 0x0067,
+        0x004b, 0x006b, 0x004f, 0x006f, 0x01ea, 0x01eb, 0x01b7, 0x0292,
+        0x006a, 0x0044, 0x0044, 0x0064, 0x0047, 0x0067, 0x01f6, 0x01f7,
+        0x004e, 0x006e, 0x00c5, 0x00e5, 0x00c6, 0x00e6, 0x00d8, 0x00f8,
+        0x0041, 0x0061, 0x0041, 0x0061, 0x0045, 0x0065, 0x0045, 0x0065,
+        0x0049, 0x0069, 0x0049, 0x0069, 0x004f, 0x006f, 0x004f, 0x006f,
+        0x0052, 0x0072, 0x0052, 0x0072, 0x0055, 0x0075, 0x0055, 0x0075,
+        0x0053, 0x0073, 0x0054, 0x0074, 0x021c, 0x021d, 0x0048, 0x0068,
+        0x0220, 0x0221, 0x0222, 0x0223, 0x0224, 0x0225, 0x0041, 0x0061,
+        0x0045, 0x0065, 0x00d6, 0x00f6, 0x00d5, 0x00f5, 0x004f, 0x006f,
+        0x022e, 0x022f, 0x0059, 0x0079, 0x0234, 0x0235, 0x0236, 0x0237,
+        0x0238, 0x0239, 0x023a, 0x023b, 0x023c, 0x023d, 0x023e, 0x023f,
+        0x0240, 0x0241, 0x0242, 0x0243, 0x0244, 0x0245, 0x0246, 0x0247,
+        0x0248, 0x0249, 0x024a, 0x024b, 0x024c, 0x024d, 0x024e, 0x024f,
+        0x0250, 0x0251, 0x0252, 0x0253, 0x0254, 0x0255, 0x0256, 0x0257,
+        0x0258, 0x0259, 0x025a, 0x025b, 0x025c, 0x025d, 0x025e, 0x025f,
+        0x0260, 0x0261, 0x0262, 0x0263, 0x0264, 0x0265, 0x0266, 0x0267,
+        0x0268, 0x0269, 0x026a, 0x026b, 0x026c, 0x026d, 0x026e, 0x026f,
+        0x0270, 0x0271, 0x0272, 0x0273, 0x0274, 0x0275, 0x0276, 0x0277,
+        0x0278, 0x0279, 0x027a, 0x027b, 0x027c, 0x027d, 0x027e, 0x027f,
+        0x0280, 0x0281, 0x0282, 0x0283, 0x0284, 0x0285, 0x0286, 0x0287,
+        0x0288, 0x0289, 0x028a, 0x028b, 0x028c, 0x028d, 0x028e, 0x028f,
+        0x0290, 0x0291, 0x0292, 0x0293, 0x0294, 0x0295, 0x0296, 0x0297,
+        0x0298, 0x0299, 0x029a, 0x029b, 0x029c, 0x029d, 0x029e, 0x029f,
+        0x02a0, 0x02a1, 0x02a2, 0x02a3, 0x02a4, 0x02a5, 0x02a6, 0x02a7,
+        0x02a8, 0x02a9, 0x02aa, 0x02ab, 0x02ac, 0x02ad, 0x02ae, 0x02af,
+        0x0068, 0x0266, 0x006a, 0x0072, 0x0279, 0x027b, 0x0281, 0x0077,
+        0x0079, 0x02b9, 0x02ba, 0x02bb, 0x02bc, 0x02bd, 0x02be, 0x02bf,
+        0x02c0, 0x02c1, 0x02c2, 0x02c3, 0x02c4, 0x02c5, 0x02c6, 0x02c7,
+        0x02c8, 0x02c9, 0x02ca, 0x02cb, 0x02cc, 0x02cd, 0x02ce, 0x02cf,
+        0x02d0, 0x02d1, 0x02d2, 0x02d3, 0x02d4, 0x02d5, 0x02d6, 0x02d7,
+        0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x02de, 0x02df,
+        0x0263, 0x006c, 0x0073, 0x0078, 0x0295, 0x02e5, 0x02e6, 0x02e7,
+        0x02e8, 0x02e9, 0x02ea, 0x02eb, 0x02ec, 0x02ed, 0x02ee, 0x02ef,
+        0x02f0, 0x02f1, 0x02f2, 0x02f3, 0x02f4, 0x02f5, 0x02f6, 0x02f7,
+        0x02f8, 0x02f9, 0x02fa, 0x02fb, 0x02fc, 0x02fd, 0x02fe, 0x02ff,
+        0x0300, 0x0301, 0x0302, 0x0303, 0x0304, 0x0305, 0x0306, 0x0307,
+        0x0308, 0x0309, 0x030a, 0x030b, 0x030c, 0x030d, 0x030e, 0x030f,
+        0x0310, 0x0311, 0x0312, 0x0313, 0x0314, 0x0315, 0x0316, 0x0317,
+        0x0318, 0x0319, 0x031a, 0x031b, 0x031c, 0x031d, 0x031e, 0x031f,
+        0x0320, 0x0321, 0x0322, 0x0323, 0x0324, 0x0325, 0x0326, 0x0327,
+        0x0328, 0x0329, 0x032a, 0x032b, 0x032c, 0x032d, 0x032e, 0x032f,
+        0x0330, 0x0331, 0x0332, 0x0333, 0x0334, 0x0335, 0x0336, 0x0337,
+        0x0338, 0x0339, 0x033a, 0x033b, 0x033c, 0x033d, 0x033e, 0x033f,
+        0x0300, 0x0301, 0x0342, 0x0313, 0x0308, 0x0345, 0x0346, 0x0347,
+        0x0348, 0x0349, 0x034a, 0x034b, 0x034c, 0x034d, 0x034e, 0x034f,
+        0x0350, 0x0351, 0x0352, 0x0353, 0x0354, 0x0355, 0x0356, 0x0357,
+        0x0358, 0x0359, 0x035a, 0x035b, 0x035c, 0x035d, 0x035e, 0x035f,
+        0x0360, 0x0361, 0x0362, 0x0363, 0x0364, 0x0365, 0x0366, 0x0367,
+        0x0368, 0x0369, 0x036a, 0x036b, 0x036c, 0x036d, 0x036e, 0x036f,
+        0x0370, 0x0371, 0x0372, 0x0373, 0x02b9, 0x0375, 0x0376, 0x0377,
+        0x0378, 0x0379, 0x0020, 0x037b, 0x037c, 0x037d, 0x003b, 0x037f,
+        0x0380, 0x0381, 0x0382, 0x0383, 0x0020, 0x00a8, 0x0391, 0x00b7,
+        0x0395, 0x0397, 0x0399, 0x038b, 0x039f, 0x038d, 0x03a5, 0x03a9,
+        0x03ca, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396, 0x0397,
+        0x0398, 0x0399, 0x039a, 0x039b, 0x039c, 0x039d, 0x039e, 0x039f,
+        0x03a0, 0x03a1, 0x03a2, 0x03a3, 0x03a4, 0x03a5, 0x03a6, 0x03a7,
+        0x03a8, 0x03a9, 0x0399, 0x03a5, 0x03b1, 0x03b5, 0x03b7, 0x03b9,
+        0x03cb, 0x03b1, 0x03b2, 0x03b3, 0x03b4, 0x03b5, 0x03b6, 0x03b7,
+        0x03b8, 0x03b9, 0x03ba, 0x03bb, 0x03bc, 0x03bd, 0x03be, 0x03bf,
+        0x03c0, 0x03c1, 0x03c2, 0x03c3, 0x03c4, 0x03c5, 0x03c6, 0x03c7,
+        0x03c8, 0x03c9, 0x03b9, 0x03c5, 0x03bf, 0x03c5, 0x03c9, 0x03cf,
+        0x03b2, 0x03b8, 0x03a5, 0x03d2, 0x03d2, 0x03c6, 0x03c0, 0x03d7,
+        0x03d8, 0x03d9, 0x03da, 0x03db, 0x03dc, 0x03dd, 0x03de, 0x03df,
+        0x03e0, 0x03e1, 0x03e2, 0x03e3, 0x03e4, 0x03e5, 0x03e6, 0x03e7,
+        0x03e8, 0x03e9, 0x03ea, 0x03eb, 0x03ec, 0x03ed, 0x03ee, 0x03ef,
+        0x03ba, 0x03c1, 0x03c2, 0x03f3, 0x0398, 0x03b5, 0x03f6, 0x03f7,
+        0x03f8, 0x03a3, 0x03fa, 0x03fb, 0x03fc, 0x03fd, 0x03fe, 0x03ff,
+        0x0415, 0x0415, 0x0402, 0x0413, 0x0404, 0x0405, 0x0406, 0x0406,
+        0x0408, 0x0409, 0x040a, 0x040b, 0x041a, 0x0418, 0x0423, 0x040f,
+        0x0410, 0x0411, 0x0412, 0x0413, 0x0414, 0x0415, 0x0416, 0x0417,
+        0x0418, 0x0418, 0x041a, 0x041b, 0x041c, 0x041d, 0x041e, 0x041f,
+        0x0420, 0x0421, 0x0422, 0x0423, 0x0424, 0x0425, 0x0426, 0x0427,
+        0x0428, 0x0429, 0x042a, 0x042b, 0x042c, 0x042d, 0x042e, 0x042f,
+        0x0430, 0x0431, 0x0432, 0x0433, 0x0434, 0x0435, 0x0436, 0x0437,
+        0x0438, 0x0438, 0x043a, 0x043b, 0x043c, 0x043d, 0x043e, 0x043f,
+        0x0440, 0x0441, 0x0442, 0x0443, 0x0444, 0x0445, 0x0446, 0x0447,
+        0x0448, 0x0449, 0x044a, 0x044b, 0x044c, 0x044d, 0x044e, 0x044f,
+        0x0435, 0x0435, 0x0452, 0x0433, 0x0454, 0x0455, 0x0456, 0x0456,
+        0x0458, 0x0459, 0x045a, 0x045b, 0x043a, 0x0438, 0x0443, 0x045f,
+        0x0460, 0x0461, 0x0462, 0x0463, 0x0464, 0x0465, 0x0466, 0x0467,
+        0x0468, 0x0469, 0x046a, 0x046b, 0x046c, 0x046d, 0x046e, 0x046f,
+        0x0470, 0x0471, 0x0472, 0x0473, 0x0474, 0x0475, 0x0474, 0x0475,
+        0x0478, 0x0479, 0x047a, 0x047b, 0x047c, 0x047d, 0x047e, 0x047f,
+        0x0480, 0x0481, 0x0482, 0x0483, 0x0484, 0x0485, 0x0486, 0x0487,
+        0x0488, 0x0489, 0x048a, 0x048b, 0x048c, 0x048d, 0x048e, 0x048f,
+        0x0490, 0x0491, 0x0492, 0x0493, 0x0494, 0x0495, 0x0496, 0x0497,
+        0x0498, 0x0499, 0x049a, 0x049b, 0x049c, 0x049d, 0x049e, 0x049f,
+        0x04a0, 0x04a1, 0x04a2, 0x04a3, 0x04a4, 0x04a5, 0x04a6, 0x04a7,
+        0x04a8, 0x04a9, 0x04aa, 0x04ab, 0x04ac, 0x04ad, 0x04ae, 0x04af,
+        0x04b0, 0x04b1, 0x04b2, 0x04b3, 0x04b4, 0x04b5, 0x04b6, 0x04b7,
+        0x04b8, 0x04b9, 0x04ba, 0x04bb, 0x04bc, 0x04bd, 0x04be, 0x04bf,
+        0x04c0, 0x0416, 0x0436, 0x04c3, 0x04c4, 0x04c5, 0x04c6, 0x04c7,
+        0x04c8, 0x04c9, 0x04ca, 0x04cb, 0x04cc, 0x04cd, 0x04ce, 0x04cf,
+        0x0410, 0x0430, 0x0410, 0x0430, 0x04d4, 0x04d5, 0x0415, 0x0435,
+        0x04d8, 0x04d9, 0x04d8, 0x04d9, 0x0416, 0x0436, 0x0417, 0x0437,
+        0x04e0, 0x04e1, 0x0418, 0x0438, 0x0418, 0x0438, 0x041e, 0x043e,
+        0x04e8, 0x04e9, 0x04e8, 0x04e9, 0x042d, 0x044d, 0x0423, 0x0443,
+        0x0423, 0x0443, 0x0423, 0x0443, 0x0427, 0x0447, 0x04f6, 0x04f7,
+        0x042b, 0x044b, 0x04fa, 0x04fb, 0x04fc, 0x04fd, 0x04fe, 0x04ff,
     };
 
     // generated with:
diff --git a/java/src/com/android/inputmethod/latin/LastComposedWord.java b/java/src/com/android/inputmethod/latin/LastComposedWord.java
index af0ef4b37..4e1f5fe92 100644
--- a/java/src/com/android/inputmethod/latin/LastComposedWord.java
+++ b/java/src/com/android/inputmethod/latin/LastComposedWord.java
@@ -46,17 +46,18 @@ public class LastComposedWord {
     public final String mTypedWord;
     public final String mCommittedWord;
     public final int mSeparatorCode;
+    public final CharSequence mPrevWord;
 
     private boolean mActive;
 
     public static final LastComposedWord NOT_A_COMPOSED_WORD =
-            new LastComposedWord(null, null, null, "", "", NOT_A_SEPARATOR);
+            new LastComposedWord(null, null, null, "", "", NOT_A_SEPARATOR, null);
 
     // Warning: this is using the passed objects as is and fully expects them to be
     // immutable. Do not fiddle with their contents after you passed them to this constructor.
     public LastComposedWord(final int[] primaryKeyCodes, final int[] xCoordinates,
             final int[] yCoordinates, final String typedWord, final String committedWord,
-            final int separatorCode) {
+            final int separatorCode, final CharSequence prevWord) {
         mPrimaryKeyCodes = primaryKeyCodes;
         mXCoordinates = xCoordinates;
         mYCoordinates = yCoordinates;
@@ -64,6 +65,7 @@ public class LastComposedWord {
         mCommittedWord = committedWord;
         mSeparatorCode = separatorCode;
         mActive = true;
+        mPrevWord = prevWord;
     }
 
     public void deactivate() {
diff --git a/java/src/com/android/inputmethod/latin/LatinIME.java b/java/src/com/android/inputmethod/latin/LatinIME.java
index 45b0f46f1..e08f613ac 100644
--- a/java/src/com/android/inputmethod/latin/LatinIME.java
+++ b/java/src/com/android/inputmethod/latin/LatinIME.java
@@ -1040,16 +1040,16 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
         if (!mWordComposer.isComposingWord()) return;
         final CharSequence typedWord = mWordComposer.getTypedWord();
         if (typedWord.length() > 0) {
-            mLastComposedWord = mWordComposer.commitWord(
-                    LastComposedWord.COMMIT_TYPE_USER_TYPED_WORD, typedWord.toString(),
-                    separatorCode);
             if (ic != null) {
                 ic.commitText(typedWord, 1);
                 if (ProductionFlag.IS_EXPERIMENTAL) {
                     ResearchLogger.latinIME_commitText(typedWord);
                 }
             }
-            addToUserHistoryDictionary(typedWord);
+            final CharSequence prevWord = addToUserHistoryDictionary(typedWord);
+            mLastComposedWord = mWordComposer.commitWord(
+                    LastComposedWord.COMMIT_TYPE_USER_TYPED_WORD, typedWord.toString(),
+                    separatorCode, prevWord);
         }
         updateSuggestions();
     }
@@ -1847,8 +1847,6 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
             mExpectingUpdateSelection = true;
             commitChosenWord(autoCorrection, LastComposedWord.COMMIT_TYPE_DECIDED_WORD,
                     separatorCodePoint);
-            // Add the word to the user history dictionary
-            addToUserHistoryDictionary(autoCorrection);
             if (!typedWord.equals(autoCorrection) && null != ic) {
                 // This will make the correction flash for a short while as a visual clue
                 // to the user that auto-correction happened.
@@ -1926,8 +1924,6 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
                 LastComposedWord.NOT_A_SEPARATOR);
         // Don't allow cancellation of manual pick
         mLastComposedWord.deactivate();
-        // Add the word to the user history dictionary
-        addToUserHistoryDictionary(suggestion);
         mSpaceState = SPACE_STATE_PHANTOM;
         // TODO: is this necessary?
         mKeyboardSwitcher.updateShiftState();
@@ -1970,31 +1966,33 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
     /**
      * Commits the chosen word to the text field and saves it for later retrieval.
      */
-    private void commitChosenWord(final CharSequence bestWord, final int commitType,
+    private void commitChosenWord(final CharSequence chosenWord, final int commitType,
             final int separatorCode) {
         final InputConnection ic = getCurrentInputConnection();
         if (ic != null) {
             if (mSettingsValues.mEnableSuggestionSpanInsertion) {
                 final SuggestedWords suggestedWords = mSuggestionsView.getSuggestions();
                 ic.commitText(SuggestionSpanUtils.getTextWithSuggestionSpan(
-                        this, bestWord, suggestedWords, mIsMainDictionaryAvailable),
+                        this, chosenWord, suggestedWords, mIsMainDictionaryAvailable),
                         1);
                 if (ProductionFlag.IS_EXPERIMENTAL) {
-                    ResearchLogger.latinIME_commitText(bestWord);
+                    ResearchLogger.latinIME_commitText(chosenWord);
                 }
             } else {
-                ic.commitText(bestWord, 1);
+                ic.commitText(chosenWord, 1);
                 if (ProductionFlag.IS_EXPERIMENTAL) {
-                    ResearchLogger.latinIME_commitText(bestWord);
+                    ResearchLogger.latinIME_commitText(chosenWord);
                 }
             }
         }
+        // Add the word to the user history dictionary
+        final CharSequence prevWord = addToUserHistoryDictionary(chosenWord);
         // TODO: figure out here if this is an auto-correct or if the best word is actually
         // what user typed. Note: currently this is done much later in
         // LastComposedWord#didCommitTypedWord by string equality of the remembered
         // strings.
-        mLastComposedWord = mWordComposer.commitWord(commitType, bestWord.toString(),
-                separatorCode);
+        mLastComposedWord = mWordComposer.commitWord(commitType, chosenWord.toString(),
+                separatorCode, prevWord);
     }
 
     public void updateBigramPredictions() {
@@ -2034,15 +2032,15 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
         setSuggestionStripShown(isSuggestionsStripVisible());
     }
 
-    private void addToUserHistoryDictionary(final CharSequence suggestion) {
-        if (TextUtils.isEmpty(suggestion)) return;
+    private CharSequence addToUserHistoryDictionary(final CharSequence suggestion) {
+        if (TextUtils.isEmpty(suggestion)) return null;
 
         // Only auto-add to dictionary if auto-correct is ON. Otherwise we'll be
         // adding words in situations where the user or application really didn't
         // want corrections enabled or learned.
         if (!(mCorrectionMode == Suggest.CORRECTION_FULL
                 || mCorrectionMode == Suggest.CORRECTION_FULL_BIGRAM)) {
-            return;
+            return null;
         }
 
         if (mUserHistoryDictionary != null) {
@@ -2062,7 +2060,9 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
             }
             mUserHistoryDictionary.addToUserHistory(null == prevWord ? null : prevWord.toString(),
                     secondWord);
+            return prevWord;
         }
+        return null;
     }
 
     public boolean isCursorTouchingWord() {
@@ -2147,6 +2147,7 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
 
     // "ic" must not be null
     private void revertCommit(final InputConnection ic) {
+        final CharSequence previousWord = mLastComposedWord.mPrevWord;
         final String originallyTypedWord = mLastComposedWord.mTypedWord;
         final CharSequence committedWord = mLastComposedWord.mCommittedWord;
         final int cancelLength = committedWord.length();
@@ -2171,6 +2172,10 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
         if (ProductionFlag.IS_EXPERIMENTAL) {
             ResearchLogger.latinIME_deleteSurroundingText(deleteLength);
         }
+        if (!TextUtils.isEmpty(previousWord) && !TextUtils.isEmpty(committedWord)) {
+            mUserHistoryDictionary.cancelAddingUserHistory(
+                    previousWord.toString(), committedWord.toString());
+        }
         if (0 == separatorLength || mLastComposedWord.didCommitTypedWord()) {
             // This is the case when we cancel a manual pick.
             // We should restart suggestion on the word right away.
diff --git a/java/src/com/android/inputmethod/latin/UserHistoryDictionary.java b/java/src/com/android/inputmethod/latin/UserHistoryDictionary.java
index e13602e50..efafacc8a 100644
--- a/java/src/com/android/inputmethod/latin/UserHistoryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/UserHistoryDictionary.java
@@ -202,6 +202,15 @@ public class UserHistoryDictionary extends ExpandableDictionary {
         return freq;
     }
 
+    public boolean cancelAddingUserHistory(String word1, String word2) {
+        final Bigram bi = new Bigram(word1, word2, 0);
+        if (mPendingWrites.contains(bi)) {
+            mPendingWrites.remove(bi);
+            return super.removeBigram(word1, word2);
+        }
+        return false;
+    }
+
     /**
      * Schedules a background thread to write any pending words to the database.
      */
diff --git a/java/src/com/android/inputmethod/latin/WordComposer.java b/java/src/com/android/inputmethod/latin/WordComposer.java
index e27a546c5..ca9caa1d3 100644
--- a/java/src/com/android/inputmethod/latin/WordComposer.java
+++ b/java/src/com/android/inputmethod/latin/WordComposer.java
@@ -313,7 +313,7 @@ public class WordComposer {
 
     // `type' should be one of the LastComposedWord.COMMIT_TYPE_* constants above.
     public LastComposedWord commitWord(final int type, final String committedWord,
-            final int separatorCode) {
+            final int separatorCode, final CharSequence prevWord) {
         // Note: currently, we come here whenever we commit a word. If it's a MANUAL_PICK
         // or a DECIDED_WORD we may cancel the commit later; otherwise, we should deactivate
         // the last composed word to ensure this does not happen.
@@ -324,7 +324,8 @@ public class WordComposer {
         mXCoordinates = new int[N];
         mYCoordinates = new int[N];
         final LastComposedWord lastComposedWord = new LastComposedWord(primaryKeyCodes,
-                xCoordinates, yCoordinates, mTypedWord.toString(), committedWord, separatorCode);
+                xCoordinates, yCoordinates, mTypedWord.toString(), committedWord, separatorCode,
+                prevWord);
         if (type != LastComposedWord.COMMIT_TYPE_DECIDED_WORD
                 && type != LastComposedWord.COMMIT_TYPE_MANUAL_PICK) {
             lastComposedWord.deactivate();