Veteran Democrat Szeto Wah taught the DAB a lesson on the proper use of the Chinese language at a forum yesterday. But instead of bombarding the rival party with critical questions, he highlighted a host of errors in the Democratic Alliance for the Betterment of Hong Kong's platform literature. 'You say you have roots in the SAR. But you use the wrong word, which means colonially-rooted,' the Kowloon East candidate said. 'You say you 'build' the spirit and principle of one country, two systems. But this spirit and principle, already established, can only be fortified or maintained. 'You fight for laws on age discrimination, instead of outlawing it. 'Lastly, you monitor the Government by running in the polls. This is possible only if you are elected, not just by running,' he said. The former primary school teacher said the DAB, which is fielding secondary school teacher Lam Man-fai, had perpetrated the errors in some 480,000 campaign leaflets it had printed. Embarrassed by the unexpected attack,Chan Yuen-han said that typesetters might have made mistakes.