@ Tom, from my limited perspective, I've seen that the culture skills normally outweigh the language skills. I'd be more interested in seeing how much time those people have overseas away from the flagpole.
Excellent point and I figure we both can guess a good answer!

I agree somewhat on the cultural skills having greater weight as I have met a number of folks who could speak a language but could not get along within the culture. I was lucky to have Stan with his language skills and adaptability. To paraphrase a rebuff I once heard on a sitcom, "I can lose weight, you will always be an A$$" one can learn a language but an A$$ will always be just so

Stan--usually--kept me out of trouble when my A$$hole side began to emerge

Tom