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Main sound category:	Diphthongs
Source vowel:	i : close front unrounded vowel
Target vowel:	a : open front unrounded vowel
IPA symbol:	ia
IPA description:	close front unrounded to open front unrounded diphthong
UPSID symbol:	calst_ia
UPSID description:	calst_ia
Occurs in	2 languages
That is in	0.41% of all languages
Occurs in:	Catalan (Central) Thai