The Council for Arab-British Understanding (Caabu) said the words were back to front and not joined up correctly.
The error on the huge welcome banners is an embarrassment for Westfield, which has printed the same nonsense on staff T-shirts.
Caabu pointed out to the BBC that what was written would be the equivalent of an English language sign that intended to say “welcome to London” instead saying “N O D N O L O T E M O C L E W”.
A spokesperson for Westfield told the BBC: “Westfield sincerely apologises for the incorrect printing of the welcome material. The welcome material is currently being reprinted and will be replaced as soon as possible.”
Director of Caabu Chris Doyle was unimpressed, saying: “It beggars belief they cannot even write ‘welcome’ in Arabic. What will our Olympic guests be thinking? It is cringeworthy.”
He added it was probably a mistake generated by translation software, and suggested Arabic-language posters should be checked by someone who actually speaks Arabic. How novel.