Career
He spends part of each year in the village of Schossin in northern Germany. He is author of the books Plena Manlibro de Esperanta Gramatiko (Complete Manual of Esperanto Grammar) and Landoj kaj lingvoj de la mondo (Lands and Languages of the World). He is also the author of a Swedish-language book to teach Esperanto.
On December 19, 2006 the journal Louisiana Ondo de Esperanto named him as Esperantist of the Year for 2006 in recognition of his Plena Manlibro de Esperanta Gramatiko.