Some examples of letter frequency rankings in English:
David Copperfield etaoinhsrdlmuwycfgpbvkxjqz
Pride and Prejudice etaoinhsrdlumcywfgbpvkzjxq
Wuthering Heights etaonihsrdlumcyfwgpbvkxjqz
Vanity Fair etaonhsirdlumcwfgypbvkjqxz
Gulliver's Travels etoainshrdlmucfwygpbvkxjqz
Alice in Wonderland etaoihnsrdluwgcymfpbkvqxjz
British National Corpus etaoinsrhldcumfpgwybvkxjqz
(90 million words of UK English)
Brown corpus etaoinsrhldcumfpgwybvkxjqz
(one million words of US English)
Linotype keyboard
e s c v x
t h m b z
a r f g fi
o d w k fl
i l y q ff
n u p j ffi
French: esaitnrulodmcpv e' qfgbhj a` x e` y e^ z c, o^
u` a^ u^ i^ oe k w i" e" u" ae n~
(novels, 500000 words; Engwall 1984)
esaitnrulodcmp e' vqfbghj a` x e` y e^ z a^ c,
i^ u` o^ u^ i" k e" w
(TLF, 70 million words; Brunet 1981)
Modern Greek: aoietsnEurpkmlOdg ch th ph v x z ps
(Hellenic National Corpus, 33 million words)
Norwegian: erntsilakodgmvfupbh o/ j y aa ae c w z x (q)
(newspapers, one million words; Heggstad 1982)
Swedish: eantrsildomkgv a" fhup aa o" bcyjxwz e' q ...
(newspapers, one million words; Allen 1970)
Icelandic: anriestu dh lgmkfhvo a' th i' d j o' b y ae u'
o" p e' y' c x w z q
(500000 words; Magnusson, Briem 1991)
Hungarian: eatlnskomzrig a' e' ydbvhj o: f u p o" o' c u:
i' u' u" x w (q)
(fiction, 500000 words; Furedi, Kelemen 1989)
Slovak: aoesnitrvlkdmcupzyhjgfb (qwx)
(disregarding diacritics; 200000 words; Mistrik 1985)
Also, but from limited samples:
Spanish: aeosrnlidtucmpbhy i' gvq o' jfz e' a' n~ x u' k (w)
(novel, 44000 words)
aeosrnlidutcpmvgbfyhq o' j i' a' z n~ e' x u' k w
(news, 1700 words)
Polish: iaeoznscrwymtdpk l/ ujlg e, b a, h z. s' o' c' n' f z' vqx
(novel, 80000 words)
aieonzwscrytkdpmjul l/ g b h a, e, o' z. s'
c' n' f z' x v (q)
(news, 11000 words)
Finnish: aintesl a" koumhrvpjyd o" gfbcx (qwz)
(novel, 31000 words)
enatrsildokgmvf aa uph a" cb o" jyxzw (q)
(news, 1300 words)
Portuguese: aeosrinmdutlcphvqgfb a~ z c, j a' e' x o' o~ e^ o^
a` y i' e` u' o` (kw)
(novel, 27000 words)
aeosridntmucplvgfbhq a~ c, a' e' i' z j o' e^ x
a` o~ y u' k a^ o^ w
(news, 4500 words)
Dutch: enairtodsglhkmvjzwupbcf e' y o' x c, e" i" q u" e` o^ o"
(novel, 42000 words)
enatriodslghvkmwubpjczfyx e" e' o' (q)
(news, 2900 words)
Esperanto: iaeonslrtkmjudpvgfb g^ c^ u~ c s^ h z j^ w y x (q)
(Robinsono Kruso, 21000 words)
aieonslrtkjudmpvgfb s^ g^ c u~ c^ z h j^ (qwxy)
(5600 words)
Czech: eonatvs i' ilmdhcujrkzp a' y e^ b s^ z^ e' r^ y' c^
u. n^ u' g t' f o' x d' (qw)
(14000 words)
oeantivlsrdkup i' m c h a' z y j b r^ e^ e' c^
z^ y' s^ u~ g f u' n^ w d' o' x t' (q)
(news, 2500 words)
Danish: enadtrslgiohmkvufbp o/ ae jyc e' xqw e` z
u" a` o' e^ c, aa e" a"
(novel, 52000 words)
erntdasilgomkvfhubp aa ae j o/ y c w z
... x ... q
(14000 words)
Hawaiian: a i k o ' e n u h l m a^ p o^ w e^ u^ i^ (bcdfgjqrstvxyz)
(12000 words)
Maori: aiketonuhrmwgp (bcdfjlqsvxyz)
(2000 words)
Class. Greek: aeiontsu e^ kprml o^ d th g ch ph x b z ps
(Thucydides, 23000 words)
aeoitnsurpkl e^ o^ mdg th ch ph b x z ps
(Xenophon, 10000 words)
Russian: oeanitslvrkdmup ya soft y g b ch z zh j sh kh
yu e shch ts f hard yo
(Anna Karenina, 280000 words)
oeaintsvlrkdmpuy soft ya g b z ch j kh zh sh
yu ts shch e f hard (yo)
(Solzhenitsyn, 86000 words)
oeaintsrvlkmdpuy ya soft g z b ch j zh kh yu
sh ts shch e f hard yo
(news, 25000 words)
Turkish: aeinrlIkdtmsyuob u" s, zgvhc g~ c, p o" f j w x q
(news, 73000 words)
aeinlrIdktsymuob u" s, zgvhp c, g~ c o" f j w q x
(news, 17000 words)
Latin: eituasrnomcpldqbgvfhxyk (z) (jw)
(Caesar, 52000 words)
ietuasnmorcdlpqvbgfhxyz (k) (jw)
(Seneca, 18000 words)
eiuatsrnmocldpqbgfvxhyz (k) (jw)
(Livy, 17000 words)
Italian: aeiolnrtscdupmvgfbzhq o` a` u` i` e' e` o'
y k w x j o^
(37000 words)
German: enirsahtduclgmobwfkzv u" p a" ss j o" y q x ...
(Effi Briest, 32000 words)
enisrthdaulcgmowbfzkv u" p a" o" j y x q
(Nietzsche, 72000 words)
enirtsadhlucmgobfwkpzv a" u" o" ss j y x q
(science, 4600 words)
Welsh: ayndreiloghwtfuscmbp a^ o^ y^ w^ j i" e^ a'
q v i^ (kxz)
(government document, 13000 words)
Irish: aihnretscoldgumb a' f i' e' u' o' pvjwykqz (x)
(news, 5400 words)
ainhrtesocldgmub i' a' f e' p u' o' yvkwjq (xz)
(news, 3400 words)
Gaelic: aihndercsgloutmb a` f p o` u` e' i` e` o' (jkqvwxyz)
(1400 words)