in pre-interesting times talk there were also some times mentioned feet and other times - meters. but from the talks it seems they settled on all of it being meters in future. so this must be alright, and not contributing in any way.
another note controller did double his numbers in Russian in English once. to make sure they got it. because I think they tended to say Thank you instead of repeating numbers or the info they've got.
I don't think this influenced any thing either, but overall the chap in the control was not a total goner :o) rather doubt he could chat in English with them, but with numbers he could, when needed.