Recently he was faced with the same problem. Found a solution to this issue on the website auction for translators "TranslatorAuction.com". Really liked this website. There is a translation of your test tasks and evaluation of the quality of his translation will hold the maximum number of translators.
Nathen_Renn answered on April 19th 20 at 12:07
Yes, on any exchange choose a person with a high rating.
alda_Nienow20 answered on April 19th 20 at 12:09
To invite for consultation a third party that knows the language.