I've looked into cab files and it seems that it's multi-language version. Of course you need to update your B&M with correct language voice files (from your fiat page), but in cab files I can see SMS reading files to read localized (in many langs) abbreviations.
My A500 is currently in Abarth service because of the problem with B&M <-> B&M Map connectivity, they did nothing during whole day so I'll visit them tommorow with those updates (there's also new updated application for cooperation with B&M Map on Italian Fiat page) and show them how to resolve this issue

As an example I'm attaching fragment of an XML file for English abbreviations taken from updated software package:
<?xml version="1.0"?>
<ArrayOfI xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="
http://www.w3.org/2001/XMLSchema">
<I F="

" R="<audio src="emoticons"/> happy. " />
<I F=":-)" R="<audio src="emoticons"/> happy. " />
<I F="

" R="<audio src="emoticons"/> an happy. " />
<I F=":-(" R="<audio src="emoticons"/> an happy. " />
<I F="

" R="<audio src="emoticons"/> winnking. " />
<I F=";-)" R="<audio src="emoticons"/> winnking. " />
<I F=":-;" R="<audio src="emoticons"/> winnking. " />
<I F="

" R="<audio src="emoticons"/> delighted. " />
<I F=":-D" R="<audio src="emoticons"/> delighted. " />
<I F=";-D" R="<audio src="emoticons"/> delighted. " />
<I F=":-/" R="<audio src="emoticons"/> confused. " />
<I F="

" R="<audio src="emoticons"/> confused. " />
<I F=":-P" R="<audio src="emoticons"/> tongue stuck out. " />
<I F="

" R="<audio src="emoticons"/> tongue stuck out. " />
<I F=":*" R="<audio src="emoticons"/> kiss you. " />
<I F="

" R="<audio src="emoticons"/> kiss you. " />
<I F=":O" R="<audio src="emoticons"/> surprised. " />
<I F=":-O" R="<audio src="emoticons"/> surprised. " />
<I F="X(" R="<audio src="emoticons"/> angry. " />
<I F=":>" R="<audio src="emoticons"/> clever clogs. " />
<I F=":->" R="<audio src="emoticons"/> clever clogs. " />
<I F="B)" R="<audio src="emoticons"/> coo ool. " />
<I F="B-)" R="<audio src="emoticons"/> coo ool. " />
<I F="

" R="<audio src="emoticons"/> crying. " />
<I F=":X" R="<audio src="emoticons"/> not a word. " />
<I F="

" R="<audio src="emoticons"/> not a word. " />
<I F=":-S" R="<audio src="emoticons"/> worried. " />
<I F=":-Z" R="<audio src="emoticons"/> worried. " />
<I F="

(" R="<audio src="emoticons"/> sobbing. " />
<I F="

)" R="<audio src="emoticons"/> larfing. " />