diff --git a/spacy/en.pxd b/spacy/en.pxd
index cee754d9c..4ac8a126d 100644
--- a/spacy/en.pxd
+++ b/spacy/en.pxd
@@ -125,23 +125,5 @@ cpdef enum:
     N_CONTEXT_FIELDS
 
 
-cdef inline void fill_pos_context(atom_t* context, const int i, const TokenC* tokens) nogil:
-    _fill_from_token(&context[P2_sic], &tokens[i-2])
-    _fill_from_token(&context[P1_sic], &tokens[i-1])
-    _fill_from_token(&context[W_sic], &tokens[i])
-    _fill_from_token(&context[N1_sic], &tokens[i+1])
-    _fill_from_token(&context[N2_sic], &tokens[i+2])
-
-
-cdef inline void _fill_from_token(atom_t* context, const TokenC* t) nogil:
-    context[0] = t.lex.sic
-    context[1] = t.lex.cluster
-    context[2] = t.lex.shape
-    context[3] = t.lex.prefix
-    context[4] = t.lex.suffix
-    context[5] = t.pos
-    context[6] = t.sense
-
-
 cdef class English(Language):
     pass
diff --git a/spacy/en.pyx b/spacy/en.pyx
index 9cd2546cb..10773e0e2 100644
--- a/spacy/en.pyx
+++ b/spacy/en.pyx
@@ -151,10 +151,14 @@ cdef class English(Language):
         cdef int i
         cdef atom_t[N_CONTEXT_FIELDS] context
         cdef TokenC* t = tokens.data
+        assert self.morphologizer is not None
+        cdef dict tagdict = self.pos_tagger.tagdict
         for i in range(tokens.length):
-            fill_pos_context(context, i, t)
-            t[i].pos = self.pos_tagger.predict(context)
-            if self.morphologizer:
+            if t[i].lex.sic in tagdict:
+                t[i].pos = tagdict[t[i].lex.sic]
+            else:
+                fill_pos_context(context, i, t)
+                t[i].pos = self.pos_tagger.predict(context)
                 self.morphologizer.set_morph(i, t)
 
     def train_pos(self, Tokens tokens, golds):
@@ -165,27 +169,27 @@ cdef class English(Language):
         for i in range(tokens.length):
             fill_pos_context(context, i, t)
             t[i].pos = self.pos_tagger.predict(context, [golds[i]])
-            if self.morphologizer:
-                self.morphologizer.set_morph(i, t)
+            self.morphologizer.set_morph(i, t)
             c += t[i].pos == golds[i]
         return c
 
 
-cdef int _merge_morph(Morphology* tok_morph, const Morphology* pos_morph) except -1:
-    if tok_morph.number == 0:
-        tok_morph.number = pos_morph.number
-    if tok_morph.tenspect == 0:
-        tok_morph.tenspect = pos_morph.tenspect
-    if tok_morph.mood == 0:
-        tok_morph.mood = pos_morph.mood
-    if tok_morph.gender == 0:
-        tok_morph.gender = pos_morph.gender
-    if tok_morph.person == 0:
-        tok_morph.person = pos_morph.person
-    if tok_morph.case == 0:
-        tok_morph.case = pos_morph.case
-    if tok_morph.misc == 0:
-        tok_morph.misc = pos_morph.misc
+cdef int fill_pos_context(atom_t* context, const int i, const TokenC* tokens) except -1:
+    _fill_from_token(&context[P2_sic], &tokens[i-2])
+    _fill_from_token(&context[P1_sic], &tokens[i-1])
+    _fill_from_token(&context[W_sic], &tokens[i])
+    _fill_from_token(&context[N1_sic], &tokens[i+1])
+    _fill_from_token(&context[N2_sic], &tokens[i+2])
+
+
+cdef inline void _fill_from_token(atom_t* context, const TokenC* t) nogil:
+    context[0] = t.lex.sic
+    context[1] = t.lex.cluster
+    context[2] = t.lex.shape
+    context[3] = t.lex.prefix
+    context[4] = t.lex.suffix
+    context[5] = t.pos
+    context[6] = t.sense
 
 
 EN = English('en')
diff --git a/spacy/morphology.pxd b/spacy/morphology.pxd
index 084cbbbe6..31cb08855 100644
--- a/spacy/morphology.pxd
+++ b/spacy/morphology.pxd
@@ -35,8 +35,8 @@ cdef class Morphologizer:
     cdef StringStore strings
     cdef object lemmatizer
     cdef PosTag* tags
+    cdef readonly list tag_names
 
-    cdef PreshMapArray _morph
-    cdef PreshMapArray _lemmas
+    cdef PreshMapArray _cache
     cdef int lemmatize(self, const univ_tag_t pos, const Lexeme* lex) except -1
     cdef int set_morph(self, const int i, TokenC* tokens) except -1
diff --git a/spacy/morphology.pyx b/spacy/morphology.pyx
index 63c5ff827..b21a3ced4 100644
--- a/spacy/morphology.pyx
+++ b/spacy/morphology.pyx
@@ -1,8 +1,10 @@
+# cython: profile=True
+# cython: embedsignature=True
 from os import path
 import json
 
 from .lemmatizer import Lemmatizer
-
+from .typedefs cimport id_t
 
 UNIV_TAGS = {
     'NULL': NO_TAG,
@@ -22,6 +24,11 @@ UNIV_TAGS = {
 }
 
 
+cdef struct _Cached:
+    Morphology morph
+    int lemma
+
+
 cdef class Morphologizer:
     """Given a POS tag and a Lexeme, find its lemma and morphological analysis.
     """
@@ -30,12 +37,11 @@ cdef class Morphologizer:
         self.strings = strings
         cfg = json.load(open(path.join(data_dir, 'pos', 'config.json')))
         tag_map = cfg['tag_map']
-        tag_names = cfg['tag_names']
+        self.tag_names = cfg['tag_names']
         self.lemmatizer = Lemmatizer(path.join(data_dir, '..', 'wordnet'))
-        self._lemmas = PreshMapArray(N_UNIV_TAGS)
-        self._morph = PreshMapArray(len(tag_names))
-        self.tags = <PosTag*>self.mem.alloc(len(tag_names), sizeof(PosTag))
-        for i, tag in enumerate(tag_names):
+        self._cache = PreshMapArray(len(self.tag_names))
+        self.tags = <PosTag*>self.mem.alloc(len(self.tag_names), sizeof(PosTag))
+        for i, tag in enumerate(self.tag_names):
             pos, props = tag_map[tag]
             self.tags[i].id = i
             self.tags[i].pos = pos
@@ -46,15 +52,15 @@ cdef class Morphologizer:
             self.tags[i].morph.person = props.get('person', 0)
             self.tags[i].morph.case = props.get('case', 0)
             self.tags[i].morph.misc = props.get('misc', 0)
+        if path.exists(path.join(data_dir, 'morph.json')):
+            with open(path.join(data_dir, 'morph.json')) as file_:
+                self.load_exceptions(json.loads(file_))
 
     cdef int lemmatize(self, const univ_tag_t pos, const Lexeme* lex) except -1:
         if self.lemmatizer is None:
             return lex.sic
         if pos != NOUN and pos != VERB and pos != ADJ:
             return lex.sic
-        cdef int lemma = <int><size_t>self._lemmas.get(pos, lex.sic)
-        if lemma != 0:
-            return lemma
         cdef bytes py_string = self.strings[lex.sic]
         cdef set lemma_strings
         cdef bytes lemma_string
@@ -67,15 +73,45 @@ cdef class Morphologizer:
             lemma_strings = self.lemmatizer.adj(py_string)
         lemma_string = sorted(lemma_strings)[0]
         lemma = self.strings.intern(lemma_string, len(lemma_string)).i
-        self._lemmas.set(pos, lex.sic, <void*>lemma)
         return lemma
 
     cdef int set_morph(self, const int i, TokenC* tokens) except -1:
         cdef const PosTag* tag = &self.tags[tokens[i].pos]
-        tokens[i].lemma = self.lemmatize(tag.pos, tokens[i].lex)
-        morph = <Morphology*>self._morph.get(tag.id, tokens[i].lemma)
-        if morph is NULL:
-            self._morph.set(tag.id, tokens[i].lemma, <void*>&tag.morph)
-            tokens[i].morph = tag.morph
-        else:
-            tokens[i].morph = morph[0]
+        cached = <_Cached*>self._cache.get(tag.id, tokens[i].lex.sic)
+        if cached is NULL:
+            cached = <_Cached*>self.mem.alloc(1, sizeof(_Cached))
+            cached.lemma = self.lemmatize(tag.pos, tokens[i].lex)
+            cached.morph = tag.morph
+            self._cache.set(tag.id, tokens[i].lex.sic, <void*>cached)
+
+        tokens[i].lemma = cached.lemma
+        tokens[i].morph = cached.morph
+
+    def load_exceptions(self, dict exc):
+        cdef unicode pos_str
+        cdef unicode form_str
+        cdef unicode lemma_str
+        cdef dict entries
+        cdef dict props
+        cdef int lemma
+        cdef id_t sic
+        cdef univ_tag_t pos
+        for pos_str, entries in exc.items():
+            pos = self.tag_names.index(pos_str)
+            for form_str, props in entries.items():
+                lemma_str = props.get('L', form_str)
+                sic = self.strings[form_str]
+                cached = <_Cached*>self.mem.alloc(1, sizeof(_Cached))
+                cached.lemma = self.strings[lemma_str]
+                set_morph_from_dict(&cached.morph, props)
+                self._cache.set(pos, sic, <void*>cached)
+                
+
+cdef int set_morph_from_dict(Morphology* morph, dict props) except -1:
+    morph.number = props.get('number', 0)
+    morph.tenspect = props.get('tenspect', 0)
+    morph.mood = props.get('mood', 0)
+    morph.gender = props.get('gender', 0)
+    morph.person = props.get('person', 0)
+    morph.case = props.get('case', 0)
+    morph.misc = props.get('misc', 0)
diff --git a/spacy/orth.py b/spacy/orth.py
index 0462d15df..2400b38a6 100644
--- a/spacy/orth.py
+++ b/spacy/orth.py
@@ -2,6 +2,7 @@
 from __future__ import unicode_literals
 import unicodedata
 from unidecode import unidecode
+import re
 
 import math
 
diff --git a/spacy/tagger.pxd b/spacy/tagger.pxd
index 9abe25209..a896742ad 100644
--- a/spacy/tagger.pxd
+++ b/spacy/tagger.pxd
@@ -8,7 +8,7 @@ from thinc.typedefs cimport atom_t, feat_t, weight_t, class_t
 
 from preshed.maps cimport PreshMapArray
 
-from .typedefs cimport hash_t
+from .typedefs cimport hash_t, id_t
 from .tokens cimport Tokens, Morphology
 
 
diff --git a/spacy/tagger.pyx b/spacy/tagger.pyx
index a1e51c5b5..9890e95e1 100644
--- a/spacy/tagger.pyx
+++ b/spacy/tagger.pyx
@@ -72,10 +72,9 @@ cdef class Tagger:
         return tag_id
 
 
-
 def _make_tag_dict(counts):
-    freq_thresh = 50
-    ambiguity_thresh = 0.98
+    freq_thresh = 20
+    ambiguity_thresh = 0.97
     tagdict = {}
     cdef atom_t word
     cdef atom_t tag