The Translation tab allows you to customize your system generated message strings. This can be used to translate messages into a local language.

Press the Strings Translation button to open a simple text editor containing the strings.dat file:

The Comment button displays a list of all the strings you can customize.
You can copy the string from the top pane into the bottom one and perform your changes.
NOTE that where there is %s within the string, it must not be changed as this is replaced by a system variable when the string is used.
E.g.: stCatalogNoFile = 'File %s not found'