Letters That Don't Make Any Sense

Just to throw in a few more, West Slavonic languages usually use for /ts/ and for /k/. also stands in for /ch/ (as in 'church') with diacritics. Hungarian uses both as well, though I'm not sure exactly what sounds they represent. Whatever it is, it'll be backwards in some way, being Hungarian.

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The reason so many alphabets have odd sounds which they use very differently to others, or that are redundant, is because none of these alphabets were originally designed for the languages they're being used for. They're generally adopted from the alphabet next door, then twisted and reshaped a bit to fit a slightly different collection of sounds.

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Exactly why English has maintained this particular redundant letter I don't know, though.

English does use that sound, in words like 'fusion', but we don't have any special letter for it.Edit: Although, when writing things phonetically, people usually write it as a 'zh', following the example of 'sh' and 'ch'.Edited by caffeine, : No reason given.