In a letter to the world's Roman Catholics, Pope Benedict XVI has called for a new body to be set up to regulate the global economy.

In his latest encyclical entitled Caritas in Veritae - or Charity in Truth - the pope says the current economic crisis should be seized on as an opportunity to build a new economic system, with more solidarity with the poor.

The latest encyclical ran into some practical problems. The Latin translators were casting around to find words for modern-day concepts such as "tax haven" and "merchant bank".