> does Hindi language available in it?
Yes, you can select it in the add-on settings panel:
1. Select Lexicala Dictionaries service: NVDA+Y, then F2.
2. Go to settings panel: NVDA+Y, then O.
3. In section "password" you can translate words and phrases from English to Hindi.
Or in section "global" you can choose Hindi as source language.
but not all target languages may be available in this section.
You can check the checkbox "Show all available translations" to view all available target languages.