Write SQL query to solve given problem: What is the average revenue made by Latin movies?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT AVG(T1.revenue) FROM movie AS T1 INNER JOIN movie_languages AS T2 ON T1.movie_id = T2.movie_id INNER JOIN language AS T3 ON T2.language_id = T3.language_id WHERE T3.language_name = 'Latin'