Rename and Change language `at least X MB of free disk space is required` page of Inno Setup

Question

Rename and Change language a last 5.8 mb of free disk space is required on Select Destination Location page of Inno Setup

Answer 1

See Handling and customizing errors and messages in Inno Setup.

This particular message is defined by the DiskSpaceGBLabel and DiskSpaceMBLabel.

You can change it in the [Messages] section:

[Messages]
DiskSpaceGBLabel=At least [gb] GB of free disk space is required.
DiskSpaceMBLabel=At least [mb] MB of free disk space is required.