A language may undergo a (vowel shift).Logical formLearned from2 sentences. A vowel may be devocalised.Logical formLearned from2 sentences. A (vowel system) can be reduced.Logical formLearned from2 sentences. A long vowel may undergo a shortening.Logical formLearned from2 sentences. A vowel may be raised.Logical formLearned from2 sentences. A vowel can be a back.Logical formLearned from2 sentences. Vowels can be breathy.Logical formLearned from2 sentences. Vowels can be changed.Logical formLearned from2 sentences. Some symbols can be for vowels.Logical formLearned from2 sentences. A form can be with a vowel.Logical formLearned from2 sentences. A vowel may undergo a reduction.Logical formLearned from2 sentences. Unstressed vowels may undergo a reduction.Logical formLearned from2 sentences. Vowels can be unreduced.Logical formLearned from2 sentences. Syllables may contain vowels.Logical formLearned from2 sentences. Reduced vowels can be in an area.Logical formLearned from2 sentences.