Provide a sort_order tweak

resources/default_tweaks.py

@@ -217,3 +217,15 @@ generate_cover_foot_font = None
 # open_viewer, do_nothing, edit_cell. Default: open_viewer.
 # Example: doubleclick_on_library_view = 'do_nothing'
 doubleclick_on_library_view = 'open_viewer'
+
+
+# Language to use when sorting. Setting this tweak will force sorting to use the
+# collating order for the specified language. This might be useful if you run
+# calibre in English but want sorting to work in the language where you live.
+# Set the tweak to the desired ISO 639-1 language code, in lower case.
+# You can find the list of supported locales at
+# http://publib.boulder.ibm.com/infocenter/iseries/v5r3/topic/nls/rbagsicusortsequencetables.htm
+# Default: locale_for_sorting = '' -- use the language calibre displays in
+# Example: locale_for_sorting = 'fr' -- sort using French rules.
+# Example: locale_for_sorting = 'nb' -- sort using Norwegian rules.
+locale_for_sorting =  ''

src/calibre/utils/icu.py

@@ -8,6 +8,7 @@ __docformat__ = 'restructuredtext en'
 from functools import partial
 
 from calibre.constants import plugins
+from calibre.utils.config import tweaks
 
 _icu = _collator = None
 
@@ -32,7 +33,10 @@ def load_collator():
     if _collator is None:
         icu = load_icu()
         if icu is not None:
-            _collator = icu.Collator(get_lang())
+            if tweaks['locale_for_sorting']:
+                _collator = icu.Collator(tweaks['locale_for_sorting'])
+            else:
+                _collator = icu.Collator(get_lang())
     return _collator