Danis for the Danes

I have been attending a series of incredibly interesting workshops and in the next few days, I intend to run some posts about questions I have learned more about. But first, a completely superficial query.

In Providence over the weekend, I ran into our distinguished co-blogger, Berit Brogaard and was immediately struck by her uniquely Danish habit of pronouncing the final 'sh' as a slightly sibilant 's'. (Apologies in advance for not knowing enough phonology to use the proper terms.) She is "Danis" with a hiss.

And so I began to wonder:

how many of these quite localized idiosyncrasies are there?

Italians have to end their words with a vowel, and so will insert a little neutral vowel after closing consonants. Completely local (the French and the Spanish don't do it), almost impossible to control, and (I assume) that's how Italians speak in any language.

The Japanese make their 'r's into 'l's.

Malayalam speakers can't say either a short 'o' diphthong (as in 'golf' or 'Scotch') or a long perfectly flat one (as in 'Mohan') -- they invariably lengthen those to match 'morning'. 'Mawhun', my relatives call me, and when I protest they mock me as having been ruined by North India.

I am looking for a specific kind of peculiarity. The following don't count (though it'd be fun to hear about any and every peculiarity of non-native speech).

The Russian 'r' is rolled, but as far as I know, Russians have no problems with an unrolled 'r' when speaking other languages. It's a peculiarity of Russian that doesn't transfer.

A lot of Germans say 'w' for 'v', but so do many northern Slavs. So that's not local enough.

Scots hit their 'r's pretty hard before a hard consonant, but that (again as far as I know) is only when they speak English. They don't do it when speaking Spanish.

And finally I am not looking for specificities of languages that can't easily be heard or pronounced by some non-natives: most Americans say 'Ghandi' for 'Gandhi', thus transposing the aspiration. But that's just a problem they have with a specific sequence of sounds in a particular language.

Other examples, readers?