Its sounds like AudioLabel is having a problem loading the "Arial" font. Anytime there is a problem loading a font, AudioLabel will chose the next available font (which could explain why you see Arabic).
This problem might have to do with Greek characters in the font name. Currently, AudioLabel supports the ASCII character set, but does not support the Unicode character set (which is required to fully support all Greek characters).
When you select the "Arial" font in AudioLabel, is the font listed as "Arial", or does the font name have Greek characters in it?