WikipediaにあるLetter frequencyの記事に記載されている表から、インテルステノで使用する言語のみを抜粋しました（たのんさんがtwitterでつぶやいていた情報より）。出典などの詳細はWikipediaの記事をご確認ください。
また表には掲載されていない言語のうち、ルーマニア語とスロバキア語を除く３言語の文字出現頻度については他のWikipediaのページで確認できます（ルーマニア語、スロバキア語の文字出現頻度について情報をご存じの方はお知らせいただけると助かります）。
アルファベットのうち1%未満は赤字にしています。ただし1%未満であっても出現しないわけではないことにご注意ください（たとえば英語の場合、jが0.153%、qが0.095%、xが0.150%、zが0.074%です）。
また、各言語の使用頻度が高い上位５文字、および特殊文字のうち1%以上は太字にしています。
| イタリア語 | フランス語 | スペイン語 | ポルトガル語 | ドイツ語 | オランダ語 | チェコ語 | ポーランド語 | フィンランド語 | トルコ語 | |
|---|---|---|---|---|---|---|---|---|---|---|
| a | 11.745% | 7.636% | 11.525% | 14.634% | 6.516% | 7.486% | 8.421% | 10.503% | 12.217% | 12.920% |
| b | 0.927% | 0.901% | 2.215% | 1.043% | 1.886% | 1.584% | 0.822% | 1.740% | 0.281% | 2.844% |
| c | 4.501% | 3.260% | 4.019% | 3.882% | 2.732% | 1.242% | 0.740% | 3.895% | 0.281% | 1.463% |
| d | 3.736% | 3.669% | 5.010% | 4.992% | 5.076% | 5.933% | 3.475% | 3.725% | 1.043% | 5.206% |
| e | 11.792% | 14.715% | 12.181% | 12.570% | 16.396% | 18.910% | 7.562% | 7.352% | 7.968% | 9.912% |
| f | 1.153% | 1.066% | 0.692% | 1.023% | 1.656% | 0.805% | 0.084% | 0.143% | 0.194% | 0.461% |
| g | 1.644% | 0.866% | 1.768% | 1.303% | 3.009% | 3.403% | 0.092% | 1.731% | 0.392% | 1.253% |
| h | 0.636% | 0.737% | 0.703% | 0.781% | 4.577% | 2.380% | 1.356% | 1.015% | 1.851% | 1.212% |
| i | 10.143% | 7.529% | 6.247% | 6.186% | 6.550% | 6.499% | 6.073% | 8.328% | 10.817% | 9.600% |
| j | 0.011% | 0.613% | 0.493% | 0.397% | 0.268% | 1.460% | 1.433% | 1.836% | 2.042% | 0.034% |
| k | 0.009% | 0.049% | 0.011% | 0.015% | 1.417% | 2.248% | 2.894% | 2.753% | 4.973% | 5.683% |
| l | 6.510% | 5.456% | 4.967% | 2.779% | 3.437% | 3.568% | 3.802% | 2.564% | 5.761% | 5.922% |
| m | 2.512% | 2.968% | 3.157% | 4.738% | 2.534% | 2.213% | 2.446% | 2.515% | 3.202% | 3.752% |
| n | 6.883% | 7.095% | 6.712% | 4.446% | 9.776% | 10.032% | 6.468% | 6.237% | 8.826% | 7.987% |
| o | 9.832% | 5.796% | 8.683% | 9.735% | 2.594% | 6.063% | 6.695% | 6.667% | 5.614% | 2.976% |
| p | 3.056% | 2.521% | 2.510% | 2.523% | 0.670% | 1.570% | 1.906% | 2.445% | 1.842% | 0.886% |
| q | 0.505% | 1.362% | 0.877% | 1.204% | 0.018% | 0.009% | 0.001% | 0 | 0.013% | 0 |
| r | 6.367% | 6.693% | 6.871% | 6.530% | 7.003% | 6.411% | 4.799% | 5.243% | 2.872% | 7.722% |
| s | 4.981% | 7.948% | 7.977% | 6.805% | 7.270% | 3.730% | 5.212% | 5.224% | 7.862% | 3.014% |
| t | 5.623% | 7.244% | 4.632% | 4.336% | 6.154% | 6.790% | 5.727% | 2.475% | 8.750% | 3.314% |
| u | 3.011% | 6.311% | 2.927% | 3.639% | 4.166% | 1.990% | 2.160% | 2.062% | 5.008% | 3.245% |
| v | 2.097% | 1.838% | 1.138% | 1.575% | 0.846% | 2.850% | 5.344% | 0.012% | 2.250% | 0.959% |
| w | 0.033% | 0.074% | 0.017% | 0.037% | 1.921% | 1.520% | 0.016% | 5.813% | 0.094% | 0 |
| x | 0.003% | 0.427% | 0.215% | 0.253% | 0.034% | 0.036% | 0.027% | 0.004% | 0.031% | 0 |
| y | 0.020% | 0.128% | 1.008% | 0.006% | 0.039% | 0.035% | 1.043% | 3.206% | 1.745% | 3.336% |
| z | 1.181% | 0.326% | 0.467% | 0.470% | 1.134% | 1.390% | 1.503% | 4.852% | 0.051% | 1.500% |
| à | 0.635% | 0.486% | 0 | 0.072% | 0 | 0 | 0 | 0 | 0 | 0 |
| â | 0 | 0.051% | 0 | 0.562% | 0 | 0 | 0 | 0 | 0 | 0 |
| á | 0 | 0 | 0.502% | 0.118% | 0 | 0 | 0.867% | 0 | 0 | 0 |
| å | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.003% | 0 |
| ä | 0 | 0 | 0 | 0 | 0.578% | 0 | 0 | 0 | 3.577% | 0 |
| ã | 0 | 0 | 0 | 0.733% | 0 | 0 | 0 | 0 | 0 | 0 |
| ą | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
0.699% |
0 | 0 |
| æ | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| œ | 0 | 0.018% | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| ç | 0 | 0.085% | 0 | 0.530% | 0 | 0 | 0 | 0 | 0 | 1.156% |
| ĉ | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| ć | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.743% | 0 | 0 |
| č | 0 | 0 | 0 | 0 | 0 | 0 | 0.462% | 0 | 0 | 0 |
| ď | 0 | 0 | 0 | 0 | 0 | 0 | 0.015% | 0 | 0 | 0 |
| è | 0.263% | 0.271% | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| é | 0 | 1.504% | 0.433% | 0.337% | 0 | 0 | 0.633% | 0 | 0 | 0 |
| ê | 0 | 0.218% | 0 | 0.450% | 0 | 0 | 0 | 0 | 0 | 0 |
| ë | 0 | 0.008% | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| ę | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.035% | 0 | 0 |
| ě | 0 | 0 | 0 | 0 | 0 | 0 | 1.222% | 0 | 0 | 0 |
| ğ | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.125% |
| î | 0 | 0.045% | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| ì | 0.030% | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| í | 0 | 0 | 0.725% | 0.132% | 0 | 0 | 1.643% | 0 | 0 | 0 |
| ï | 0 | 0.005% | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| ı | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5.114% |
| ł | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2.109% | 0 | 0 |
| ñ | 0 | 0 | 0.311% | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| ń | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.362% | 0 | 0 |
| ň | 0 | 0 | 0 | 0 | 0 | 0 | 0.007% | 0 | 0 | 0 |
| ò | 0.002% | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| ö | 0 | 0 | 0 | 0 | 0.443% | 0 | 0 | 0 | 0.444% | 0.777% |
| ô | 0 | 0.023% | 0 | 0.635% | 0 | 0 | 0 | 0 | 0 | 0 |
| õ | 0 | 0 | 0 | ????? | 0 | 0 | 0 | 0 | 0 | 0 |
| ó | 0 | 0 | 0.827% | 0.296% | 0 | 0 | 0.024% | 1.141% | 0 | 0 |
| ř | 0 | 0 | 0 | 0 | 0 | 0 | 0.380% | 0 | 0 | 0 |
| ş | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.780% |
| ś | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.814% | 0 | 0 |
| š | 0 | 0 | 0 | 0 | 0 | 0 | 0.688% | 0 | 0 | 0 |
| ß | 0 | 0 | 0 | 0 | 0.307% | 0 | 0 | 0 | 0 | 0 |
| ť | 0 | 0 | 0 | 0 | 0 | 0 | 0.006% | 0 | 0 | 0 |
| ù | 0.166% | 0.058% | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| ú | 0 | 0 | 0.168% | 0.207% | 0 | 0 | 0.045% | 0 | 0 | 0 |
| ŭ | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| ü | 0 | 0 | 0.012% | 0.026% | 0.995% | 0 | 0 | 0 | 0 | 1.854% |
| ů | 0 | 0 | 0 | 0 | 0 | 0 | 0.204% | 0 | 0 | 0 |
| ý | 0 | 0 | 0 | 0 | 0 | 0 | 0.995% | 0 | 0 | 0 |
| ź | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.078% | 0 | 0 |
| ż | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.706% | 0 | 0 |
| ž | 0 | 0 | 0 | 0 | 0 | 0 | 0.721% | 0 | 0 | 0 |
