1. go to https://cxserver.wikimedia.org/v2?doc#/
2. find the section /v1/mt/{from}/{to}/{mtprovider}
3. according to the spec.yaml, the response is { html: "<p>hello world</p>" }
4. but the actual response is {contents: "<p>hello world</p>"}

figure out which is the right response and update the spec or config.