Lost label-captions after importing data-grid

After importing grid from project A into B only the labels for 'Dutch' show up in the screen (desingn mode) when I'm switching language configuration. Both projects contain Languages 'English, United States' and 'Dutch, Nederlands'. English configuration labels only show <> in project B. In project A label-text are surrounded by <>. Under 'Language operations' the number of English labels (B) has not changed. Is there a way to prevent to add all these by hand?
1 answers

Use: Tools/Language operations. Select the module and the language that contains valid text and a target language. Select operation 'Copy'. Voila.