There are five vowels in Serbian language: a, e,
i, o, u, which are
always very clear and are always pronounced. The consonant r
can also be used as a vowel. All vowels including r can be either long
or short, but their lenght does not affect their quality. Neither is
their pronunciation affected by their position in the word or by the
stress of the word.
There are no diphthongs in Serbian.