diff --git a/src/calibre/gui2/viewer/javascript.py b/src/calibre/gui2/viewer/javascript.py
index d1b0b47c8a..1bc617d8b9 100644
--- a/src/calibre/gui2/viewer/javascript.py
+++ b/src/calibre/gui2/viewer/javascript.py
@@ -7,11 +7,10 @@ __license__   = 'GPL v3'
 __copyright__ = '2012, Kovid Goyal <kovid@kovidgoyal.net>'
 __docformat__ = 'restructuredtext en'
 
-import os, zipfile
+import os
 
 import calibre
-from calibre.utils.localization import lang_as_iso639_1
-from calibre.utils.resources import compiled_coffeescript
+from calibre.utils.resources import compiled_coffeescript, load_hyphenator_dicts
 
 
 class JavaScriptLoader(object):
@@ -67,9 +66,7 @@ class JavaScriptLoader(object):
                 ans = P(src, data=True,
                         allow_user_override=False).decode('utf-8')
             else:
-                dynamic = (self._dynamic_coffeescript and
-                           calibre.__file__ and not calibre.__file__.endswith('.pyo') and
-                           os.path.exists(calibre.__file__))
+                dynamic = self._dynamic_coffeescript and calibre.__file__ and not calibre.__file__.endswith('.pyo') and os.path.exists(calibre.__file__)
                 ans = compiled_coffeescript(src, dynamic=dynamic).decode('utf-8')
             self._cache[name] = ans
 
@@ -80,29 +77,6 @@ class JavaScriptLoader(object):
             src = self.get(x)
             evaljs(src)
 
-        if not lang:
-            lang = default_lang or 'en'
-
-        def lang_name(l):
-            l = l.lower()
-            l = lang_as_iso639_1(l)
-            if not l:
-                l = 'en'
-            l = {'en':'en-us', 'nb':'nb-no', 'el':'el-monoton'}.get(l, l)
-            return l.lower().replace('_', '-')
-
-        if not self._hp_cache:
-            with zipfile.ZipFile(P('viewer/hyphenate/patterns.zip',
-                allow_user_override=False), 'r') as zf:
-                for pat in zf.namelist():
-                    raw = zf.read(pat).decode('utf-8')
-                    self._hp_cache[pat.partition('.')[0]] = raw
-
-        if lang_name(lang) not in self._hp_cache:
-            lang = lang_name(default_lang)
-
-        lang = lang_name(lang)
-
-        evaljs('\n\n'.join(self._hp_cache.itervalues()))
-
+        js, lang = load_hyphenator_dicts(self._hp_cache, lang, default_lang)
+        evaljs(js)
         return lang
diff --git a/src/calibre/utils/resources.py b/src/calibre/utils/resources.py
index 521d07852e..97e53308d7 100644
--- a/src/calibre/utils/resources.py
+++ b/src/calibre/utils/resources.py
@@ -64,6 +64,7 @@ class PathResolver(object):
 
         return ans
 
+
 _resolver = PathResolver()
 
 
@@ -117,5 +118,36 @@ def compiled_coffeescript(name, dynamic=False):
         else:
             return zf.read(name+'.js')
 
+
+def load_hyphenator_dicts(hp_cache, lang, default_lang='en'):
+    from calibre.utils.localization import lang_as_iso639_1
+    import zipfile
+    if not lang:
+        lang = default_lang or 'en'
+
+    def lang_name(l):
+        l = l.lower()
+        l = lang_as_iso639_1(l)
+        if not l:
+            l = 'en'
+        l = {'en':'en-us', 'nb':'nb-no', 'el':'el-monoton'}.get(l, l)
+        return l.lower().replace('_', '-')
+
+    if not hp_cache:
+        with zipfile.ZipFile(P('viewer/hyphenate/patterns.zip',
+            allow_user_override=False), 'r') as zf:
+            for pat in zf.namelist():
+                raw = zf.read(pat).decode('utf-8')
+                hp_cache[pat.partition('.')[0]] = raw
+
+    if lang_name(lang) not in hp_cache:
+        lang = lang_name(default_lang)
+
+    lang = lang_name(lang)
+
+    js = '\n\n'.join(hp_cache.itervalues())
+    return js, lang
+
+
 __builtin__.__dict__['P'] = get_path
 __builtin__.__dict__['I'] = get_image_path