There was a problem with dropdowns on upgrading to RH7 where
they could open blank. That was fixed in a patch so I am wondering
if you have updated to 7.0.2 and your translation house has not. I
don't know that opening in an unpatched version after upgrade would
have the same problem, just offering it as a possibility.
Otherwise I think you need to be working with the translation
house to work out how they undertake the translation in the hope if
identifies what went wrong.
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