Do some config.

pelicanconf.py

@@ -9,6 +9,7 @@ SITEURL = ''
 
 PATH = 'content'
 STATIC_PATHS = ['static']
+THEME = 'theme'
 
 TIMEZONE = 'Europe/Berlin'
 
@@ -38,6 +39,8 @@ DISPLAY_PAGES_ON_MENU = True
 INDEX_SAVE_AS = 'blog.html'
 PAGE_SAVE_AS = '{slug}.html'
 PAGE_URL = '{slug}.html'
+PAGE_LANG_SAVE_AS = '{slug}-{lang}.html'
+PAGE_LANG_URL = '{slug}-{lang}.html'
 
 # Uncomment following line if you want document-relative URLs when developing
 #RELATIVE_URLS = True