Clean translations

setup.py

@@ -45,9 +45,12 @@ setup(name='trytond_sale_price_list',
         'Intended Audience :: Legal Industry',
         'License :: OSI Approved :: GNU General Public License (GPL)',
         'Natural Language :: Bulgarian',
+        'Natural Language :: Czech',
+        'Natural Language :: Dutch',
         'Natural Language :: English',
         'Natural Language :: French',
         'Natural Language :: German',
+        'Natural Language :: Russian',
         'Natural Language :: Spanish',
         'Operating System :: OS Independent',
         'Programming Language :: Python :: 2.6',