Both jagshemash (jak se mas? = how are you?) and dekuji (=thank you) are czech words. Prague (Czech capital) recently became very popular among Britons, mainly because the bars don't close and beer is cheap. It's not uncommon for the british (who actually didnt know that Prague is NOT a German city before they got out of the airport) who've learned some czech words to use them. So did the famous Borat. Well we should punish him for misusing our language, right?
jagshemash= jak se mash? dobre, dekuji
how are you? fine, thx