Although not dedicated training on TranslatorX, I highly recommend going through the material in this Cisco Live session:
DGTL-BRKUCC-2932 - Troubleshooting SIP With Cisco Unified Communications
If you do not have a ciscolive.com account, go to www.ciscolive.com and create a free account. The specific sections that discuss TranslatorX are Chapter 3 and Chapter 6 which gives a hands-on live demo of TranslatorX and some of its features.