Can non-superuser install c functions ?

I am transferring a database from a system where I am a pg superuser to
one where I am not.

The database uses tsearch2.  I am unable to install any of the
functions.  For example:

CREATE FUNCTION gtsvector_in(cstring) RETURNS gtsvector
    AS '$libdir/tsearch2', 'gtsvector_in'
    LANGUAGE c STRICT;

results in: permission denied for language c

Do I need to get the pg administrator to install my database ?