Multiple languages support for SQL queries

I am using PostgreSQL and set its locale in 'English'. The encoding is UTF-8. I am inserting data (eg: table names, column names and other data) in multiple languages in the table but the statements (like CREATE, INSERT, SELECT, etc) are in default English.

Is it possible to write queries or statements in other languages (like French, Dutch,Russian, etc)? What should I do?

This is a SQL server forum. You might want to try a PostgreSQL forum.

However, generally SQL is English-only. It was initially called SEQUEL (Structured English QUEry Language) and the name was shortened to SQL because of trademark reasons.