Currently, free() method of DoctrineQuery? needs to be used to prevent some of the memory leaks, I find the syntax inconvenient . I suggest to replace this syntax

            $q = Doctrine_Query::create()
                ->from($classname.' c')
                ->leftJoin('c.Translation t INDEXBY t.lang')
                ->where('t.lang = ? AND t.name = ? '.$sAddWhere, array($lang, $name));
            $existing = $q->fetchOne(array(), Doctrine::HYDRATE_ARRAY);
            $q->free(true);

to the following:

            $existing  = Doctrine_Query::create()
                ->from($classname.' c')
                ->leftJoin('c.Translation t INDEXBY t.lang')
                ->where('t.lang = ? AND t.name = ? '.$sAddWhere, array($lang, $name))
                ->fetchOne(array(), Doctrine::HYDRATE_ARRAY_FREE);

Using the parameter HYDRATE_ARRAY_FREE would mean free() is called after hydration and thus the syntax stays clearer. Other options to solved this issue could be another parameter to the execute() method or a global setting for Doctrine.