     email varchar(64) DEFAULT NULL,
     context_tz varchar(64) DEFAULT NULL,
     signature text,
-    context_lang varchar(64) DEFAULT '',
+    context_lang varchar(16) DEFAULT '',
     -- No FK REFERENCES below, will be added later by ORM
     -- (when the destination rows exist)
     company_id int,

    subflow_id int REFERENCES wkf ON DELETE SET NULL,
    split_mode varchar(3) DEFAULT 'XOR',
    join_mode varchar(3) DEFAULT 'XOR',
    kind varchar(16) NOT NULL DEFAULT 'dummy',
    name varchar(64),
    signal_send varchar(32) DEFAULT NULL,
    flow_start boolean DEFAULT False,

    id serial NOT NULL,
    name varchar(64) DEFAULT ''::varchar NOT NULL,
    model varchar(64) DEFAULT ''::varchar NOT NULL,
    "type" varchar(16) DEFAULT 'form'::varchar NOT NULL,
    arch text NOT NULL,
    field_parent varchar(64),
    priority integer DEFAULT 5 NOT NULL,
