By default all PureVision text is in English.
When additional (.Lang) language files are available you can download and place them in the main PureVision folder. If they are valid Language Files they will automatically appear under Use Languge. This will allow you to select the available language of your choice to better understand the various text within PureVision.
You can also use PureTrans (included with PureVision) to create your own language file if one does not currently exist.