Language Certification
 

Hello everyone!
I am a maintenance technician helper cat. B1.1, I am Italian and I currently work in a base&line maintenance organization (part-145) in my native country.
I would like to improve my skills in english and I am searching for a valid language certification course that could help me to move through EU zone.
Can you guys tell me what is the most valid certification regarding maintenance?
I got aware that TEA is the most recognized by ICAO for pilots and ATCs. Anything else?!?

Awaiting for any suggestions

Thks for your time