PostgreSQL/Postgre SQL/pg language

Querying a system table: pg_language

postgres=# -- Querying a system table: pg_language
postgres=#
postgres=# SELECT * FROM pg_language;
 lanname  | lanispl | lanpltrusted | lanplcallfoid | lanvalidator | lanacl
----------+---------+--------------+---------------+--------------+--------
 internal | f       | f            |             0 |         2246 |
 c        | f       | f            |             0 |         2247 |
 sql      | f       | t            |             0 |         2248 |
(3 rows)
postgres=#