does turkish have semivowels (I think that's what they are called). by semivowel I mean "er" "ir" "or" "ur" in English where you wouldn't say "eh-r" but rather a sort of different sound that is like the Nordic "ø"
Nope, vowels keep there full sound. This is actually a common mistake made by English speakers while speaking Turkish. Turks can't understand it when we say "Bursa" :D