[NTG-context] language issue

Why do I get in the log in french: structure : dÈbut de blocsection frontmatter structure : fin de blocsection frontmatter structure : dÈbut de blocsection bodymatter structure : fin de blocsection bodymatter when I'am using: \language[nl] \mainlanguage[en] \starttext \startfrontmatter \stopfrontmatter \startbodymatter \stopbodymatter \stoptext Is there some language mixup here? yours sincerely, dr. H. van der Meer