Django slug without unicode

Question

I want to store my language Title as URL using Slugify.

For Eg: my title is வணக்கம் நண்பர்களே I want to store this as வணக்கம்-நண்பர்களே but I get வணககம-நணபரகள missing some elements in the words.

Models.py

class Blog(models.Model):
    title = models.CharField(max_length = 55)
    slug = models.CharField(max_length=80)

Views.py

slugify(input,allow_unicode=True)