@betterlate1-0 When I play the game using the internet version of Lexulous set to the UK dictionary, it does use the UK dictionary for both the regular and 2-letter word dictionaries. However, when I play on my tablet which automatically downloads the GooglePlay version of Lexulous, and set the dictionary to the UK version, the US version of the 2-letter word dictionary comes up, but only when playing a regular 2 person game. In single mode (practice) the Googleplay version does use the UK version of both the regular and 2-letter word dictionaries.
My goodness, this game has a lot of unresolved problems!!