Resizing controls during localisation

A system and methods of generating a resized dialogs for use in a new language version of a software product are described. Dialogs comprise many controls and when a software product is translated, some or all of these may need resizing. The resizing is achieved by calculating a display parameter associated with each of the controls and then comparing these required display parameters against data for the same dialog in other languages into which it has already been translated. If the same dialog in one of these other languages has, for each control in the dialog, a display parameter which is not less than the required display parameter in the new language, this other language is selected and the resized dialog for the new language is generated using the control positions and sizes for the selected other language.