Write SQL query to solve given problem: What are the official languages of the country where you can find the city with the least population?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T2.Language FROM City AS T1 INNER JOIN CountryLanguage AS T2 ON T1.CountryCode = T2.CountryCode WHERE T2.IsOfficial = 'T' ORDER BY T1.Population ASC LIMIT 1