Pioneered International House Teacher Training Programmes for Inglés as a Foreign Language (EFL) and our courses and some of the centers REMAIN MOST Sought after in the industry. We offer for Inglés Teacher Training (CELTA) in Frankfurt, Teacher Training for Spanish (FIPELE) in Frankfurt and Cologne. Our language school was founded in Frankfurt in 1998, the Cologne school in 2008. Both schools are Affiliated members of the International House World Organisation ( IHWO ). The International House World Organisation (IHWO) is one of the largest and oldest groups of language schools in the world. Founded in 1953, we are a global network of over 150 Affiliated private language schools in 52 Countries, spanning every continent.