Although schwa (/ə/) is a contrastive vowel among some languages, it is not a universal vowel in all the languages in the area. In the Tape language, schwa is very common and is in 16.5% of the lexicon. The schwa is a unique vowel because it cannot begin or end a word. It also cannot follow or come before another vowel, meaning that there must be simultaneously preceded and followed by a consonant.
