Is there a way to ignore files which have alphabets not in alphabets.txt file

I want to know, is there a way to ignore file which has alphabets not in alphabets.txt files. For example, there is a sentence
i have a migrain and i took panadol but it doesnÕt help
I want to skip this file Õt is not alphabet

Not with DS directly, but look at the importer scripts in ?bin and change one of those.

Unless you read the guidelines What and how to report if you need support and share a bit of context on what you are doing, it’s difficult for others to help you.