There are 22 languages were originally recognized by theConstitution as regional languages.  There 14 languages in the Constitution but later on 8 more languages were add to the list, First here I am providing the 14 names of languages and later the 8 names:-

This is the 14 names

1. Assamese 
2. Bengali 
3. Gujarati
4.  Hindi 
5. Kannada 
6. Kashmiri 
7. Malayalam 
8. Marathi 
9. Oriya
10. Punjabi 
11. Sanskrit 
12. Sindhi 
13. Tamil
14. Telugu

These are 8 languages later add on the list..

1. Bodo
2. Santhali
3. Maithili
4. Urdu
5. Konkani
6. Nepali
7. Manipuri (Meitei)
8. Dogri