See a table of the most common and rarest phonemes in 451 natural
languages at
http://web.phonetik.uni-frankfurt.de/upsid_segment_freq.html
You can click on a phonetic symbol to find out what it means; "b"
represnts "voiced bilabial plosive," for example, and while you're on
the "b" page, you can click on the name of any language that contains
"b" to see what other phonemes it contains.
