Hi I find that on postgres database, we can\'t configure default accent sensivity (on old mail exchanges).
Is there a way to have a _icontains also insensitive to specia
I don't believe you'll be able to use the standard Django field-lookups for this unless you store a non-accented version of your text in another column and do the lookup there. You could add a duplicate column with editable=False and override the model's save() method to update that field from the original accented text.
Python: Remove accents from unicode
PostgreSQL Wiki: Strip accents from strings, and output in lowercase