Use Text Constants

ImportAttachmentQst@1021 : TextConst 'ENU="Import attachment "';
...
IF CONFIRM(ImportAttachmentQst + Caption +'?',TRUE) THEN BEGIN

ImportAttachmentQst@1021 : TextConst 'ENU="Import attachment %1?"';
...
IF CONFIRM(STRSUBSTNO(ImportAttachmentQst, Caption),TRUE) THEN BEGIN

...
    IF NOT
        CONFIRM(
            STRSUBSTNO(
                'Difference on Periodic entries: %1 on %2' +
                'Do you want to continue?',Balance,Date),
            TRUE)
    THEN
        ERROR('Program terminated by the user');

DiffOnPeriodEntiesQst@100 : TextConst 'ENU="Difference on Periodic entries: %1 on %2\\ Do you want to continue?"';
ProgramTerminatedErr@200 : TextConst 'ENU="Program terminated by the user"';
...
    IF NOT CONFIRM(STRSUBSTNO(DiffOnPeriodEntiesQst,Balance,Date),TRUE) THEN
        ERROR(ProgramTerminatedErr);