Language restrictions should be mentioned here: https://docs.qubic.org/developers/smart-contract-architecture/
Ideally with a link to https://docs.qubic.org/developers/smart-contracts/smart-contract/restrictions
Please also link https://github.com/qubic/core/blob/main/doc/contracts.md at the relevant places. Especially, the sections Development, Review and tests, and Deployment should be read by every contract dev.