In short, no. We don’t accept any other proof of language ability, so please don’t send it to us unless we specifically ask for it - we never create accounts with automatic paid task access based on qualifications or CVs.
Your ability to post-edit machine translation to native quality is not the same skill as having general fluency, and that’s what our evaluation system aims to test. We believe in treating everyone who works with us equally and we also need to ensure excellent quality, so individually verifying each editors’ qualifications or CVs isn’t something that is viable for us.