This is the official website for ICAO's initiative on Language Proficiency Requirements (LPR). Here you will find a lot of information related to the programme.
ICAO launches revamped website for the Aviation English Language Test Service (AELTS). Please see press release at: http://www.icao.int/Newsroom/Pages/ICAO-announces-revamped-aviation-english-language-test-service-site.aspx
Worldwide Implementation of LPR