Hi there. Great stuff. 
Could you please clarify what are you referring to as the āofficial translation licenseā? Is it just permission to publish your translation?
Also, the Specification is kind of a work-in-progress still, we expect certain minor additions to be implemented in the near future. In particular, the following issues are expected to alter the document, but the scope of these changes is very narrow:
- Proposed change to variable-length arrays
- Big-endian vs. little-endian in the context of bit-level encoding
What particular revision of the document did you base your translation upon?