Uh, the way the Swiss pronounce Basel, or the way the English do?
You may have been making a veiled reference to the fact that the Swiss pronounce it three different ways themselves, but just in case you weren't:
https://www.tripadvisor.co.uk/ShowTopic-g188049-i752-k284241...
>The locals say without any doubt "Basel" with a long "a". So do the germans.
>So, in american it is something like "Baahsel"
>Some english folks pronounce it "Baahl", so do the french, who write it "Bâle".
>In italian, by the way, it is "Basilea".
I always find “long ‘a’” very unclear. Is it long like “ate” or long like “art”?