Step 1: Understanding the Concept:
The Eighth Schedule to the Constitution of India lists the official languages of the Republic of India. The question asks for the current number of languages on this list.
Step 2: Detailed Explanation:
Initially, when the Constitution was adopted, the Eighth Schedule included 14 languages. Over the years, several amendments have been made to add more languages:
\[\begin{array}{rl} \bullet & \text{Sindhi was added by the 21st Amendment in 1967.} \\ \bullet & \text{Konkani, Manipuri, and Nepali were added by the 71st Amendment in 1992.} \\ \bullet & \text{Bodo, Dogri, Maithili, and Santhali were added by the 92nd Amendment in 2003.} \\ \end{array}\]
This brings the total number of languages currently listed in the Eighth Schedule to 22.
Step 3: Final Answer:
There are 22 languages included in the Eighth Schedule of the Constitution of India.