I think English folk have difficulty pronouncing Kåsa and finding å on the keyboard without cutting and pasting so we call them kuksa's, try not to pronounce the second k and you will not be far away.
in most parts of norwegian and swedish lapland ive been to,especially in swedish and finnish parts of lapland,they use word kuksa,the kasa or kåsa and other kaså variants arent used so much.If you ask in our lapland to have kaso/kusa/kåsa/whetever,they are like "whaaat?"
,but that is most likely to happen in finnish territory and near finnish & swedish laplands borderlines where they say it like cook,with very very short oo.like if you shorten it to co-ck but dont say it like youre menaing genitals or bird,say it like youre meaning short cooking person
,and as you brits have that fine axcent,i suggest you try to say it like they say in USA(still,not like texans say,they pronounce everyTHAAAAAANG so lazy
).
if i only could say that the SA part of the word is as sharp and un-twisted like in word SKA,as that music style,but with out K.
anyways i linked in one of my replies that youtube vid where its said very well,and it works in sweden and finland just like that and you wont get long looks by saying odd kjuhk-sska´s etc.
just listen it carefully,the KUKSA comes just before he say "project", @ 0:16-0:17 minutes of that video.
http://www.youtube.com/watch?v=B-xt4lnf5kw