I.R.I.S. Readiris 14 for Mac User Guide - Manual (Page 23)

Section 2: Getting Started
18
To change the user interface language in Readiris:
 Click the System Preferences icon.
 Click the Language & Text icon.
 Drag the language of your choice to the top of the list.
The user interface of Readiris is available in a wide range of
languages.
 Restart Readiris to apply the new language settings.
C
ONFIGURING YOUR SCANNER IN
R
EADIRIS
Readiris supports all Twain 1.9 compliant scanners, all Image
Capture compliant scanners, and IRIScan 2 and higher scanners
Before you can use a scanner, however, its drivers need to be
installed on your Mac.
Image Capture scanners
 Connect your scanner to your Mac with a USB cable and power
it on.
 You are automatically asked to install or update the necessary
software.