Das sieht die UK CAA wohl auch so:

Dear Mr Storch

Thank you for your email.

At present the CAA only endorse the English Language Proficiency level, we don't endorse other languages on our licences.

As per CAP 804 Section 4 Part M - 'Privileges', to exercise the privileges of a Flight Radiotelephony Operators Licence (FRTOL) the holder must have English language proficiency Level 6, or non-expired English language proficiency at Level 4 or 5. I have attached a link below for your reference:

https://www.caa.co.uk/default.aspx?catid=2330 (CAP 804)

For further information please refer to the latest Information Notice (IN) issued in December 2012:

https://www.caa.co.uk/docs/33/srg_lts_IN2012_208_Guidance%20on%20Language%20Proficiency%20Assessments.pdf (IN)


Yours sincerley,

Flight Crew Licensing Team
Licensing & Training Standards
Civil Aviation Authority