It's true that jokes are an endangered species in phonetics, but they do exist. At the risk of being forever jokeless in class, I shall collect some of them here. (Note: you need to have Unicode fonts installed to read the phonetic symbols.)Q: What do chefs and journalists have in common?
A: They refuse to reveal their /ˈsɔ:sɪz/.
Of course, jokes involving homophones are the common currency of humorists in many languages. Here's one that may or may not travel:Q: An Englishman, an Irishman and a Scotsman are standing on a bridge watching a train go by. The Englishman says 'There she goes', the Irishman says 'There he goes' and the Scotsman says 'There it goes'. Which one of them is right?
A: The Irishman. (Wait for it...because it was a /meɪl/ train.)
(Source: Wells, J.C. (1982) The Accents of English)
Here's one relating to dental fricatives, from Singapore:Q: Why does Tarzan drive a Mazda?
A: Because he travels 323.
(The Singapore English pronunciation of 'three' / θri: / is often / tri: / 'tree'. Mazda 323: a small car popular in the 1990s. Source: Brown, A. (1991) English Pronunciation Models.)
Moving on to Scandinavia (and a possible case of final consonant cluster simplification):
A man wanting to borrow another man's newspaper asks: "Are you finished?"
And the other man replies: "No, I'm Norwegian."
(Words ending in consonant clusters such as 'finished' are frequently subject to simplification by both native and non-native speakers. In this case it would sound like 'finish' or the homophonous 'Finnish' - another Scandinavian nationality along with Norwegian and the source (sauce?) of the joke.
The phenomenon of dark /l/ vocalisation is common in many accents of English, including those of native speakers. There is the story of the London-born child who grew up thinking his father's name was Water (it was actually Walter, but the /l/ sound was completely and consistently lost). And here's the joke:
A man went to see his psychiatrist. "When I wake up, I keep on finding that I have black lines all down my body," the man said. "I know the problem," the psychiatrist told him. "You're a psychopath."
(Vocalised dark /l/ tends to be pronounced as a close back vowel, with the result that cycle path sounds similar to psychopath. Source: Phonetics Through Jokes collected by David Deterding: http://videoweb.nie.edu.sg/phonetic/pho ... tm#vocal-l