That's quite an interesting project you have. Unfortunately probably not really relevant to my use case since two skills are necessary:
1. (good) control of the native language (not english) 2. Understanding and experience at the subject field
I don't want to give too many details but the workflow basically consists of taking a poorly labeled entry and expanding/filling out the missing fields. To do this you both need to speak the language and have some experience in the field.
As for the data anomaly detection I don't do any data annotation
Anyways, sorry it's not really relevant to my case but good luck, I think it's a great project that certainly has a lot of potential. Maybe in a future stage you might be interested with partnering up with a platform like coursera to form your workers to do slightly more complex data annotation jobs (like mine).
Regards