u/sp___639___2014

Least characters / letters:
Rotokas: 12 letters
Hawaiian: 12 letters

Languages with standard amount of characters / letters:
Italian: 21 letters
Hebrew: 22 letters
Latin: 23 letters
Greek: 24 letters
Korean: 24 letters
English: 26 letters
French: 26 letters
Spanish: 27 letters (has ñ)
German: 26 letters (30 letters with 4 special characters)
Arabic: 28 letters
Turkish: 29 letters
Norwegian: 29 letters
Danish: 29 letters
Finnish: 29 letters
Serbian: 30 letters
Bulgarian: 30 letters
Maltese: 30 letters
Romanian: 31 letters
Icelandic: 32 letters
Persian: 32 letters
Russian: 33 letters
Ukrainian: 33 letters
Urdu: 39 letters
Thai: 44 letters
Bengali: 50 letters
Hindi: 52 letters
Sanskrit: 52 letters
Khmer: 72 letters
Tamil: 247 letters

Most characters / letters:
Japanese: 46 hiragana + 46 katakana + 2,136 kanji = 2,228 characters
Chinese: 100,000+ characters