Perhaps it may be funny, what about COBOL?

[JacoboFeijoo]

Banks, Insurance Companies, Healthcare, Defence... COBOL is still alive. To see COBOL 'translated' to WebAssembly may be a good idea. Thanks in advance.

[kripken]

See Cloudflare's blogpost on supporting COBOL in wasm. They compile COBOL to C and then C to wasm.