Bulk rename files with csv file

BulkRename.applescript

-- Store the .csv file in the same directory as the files you wish to rename
-- Replace 'username' in the path with your own (lines 3 & 10)
set csvFile to "/Users/username/Documents/index.csv"

set csvList to paragraphs of (read csvFile)
set {theID, my text item delimiters} to {my text item delimiters, ","}
repeat with csvLines in csvList
	set {oldName, newName} to text items of csvLines
	tell application "System Events"
		set name of file oldName of folder "/Users/username/Documents/" to newName
	end tell
end repeat
set my text item delimiters to theID

How can it be set up to identify and use foreign language characters? Thanks for the help! Im getting this error.

Hi, nrollr.

So, this is a csv file with oldName and newName in 2 different columns? Thanks!