Add language field to case studies

apps/map/models.py

@@ -314,6 +314,9 @@ class CaseStudy(models.Model):
     # Slug derived from entry_name, used in urls for SEO
     slug = AutoSlugField(populate_from=['entry_name'], editable=False)
 
+    # Language this case study is written in
+    language = models.CharField(max_length=16, blank=True)
+
     ##
     # Territory info
     ##