Z is used 0.07% of the alphabet
All letters of the alphabet are used in the English language. There are none that are excluded from common words.
The least used letter in the Alphabet is Q! or it's Z!
There are 8 letters in alphabet, or 7 "unique" letters (A appears twice). There are 26 letters in the English (Roman/Latin) alphabet.
The English language alphabet has 26 letters.
An abecedarium is a book used to teach the alphabet, or an inscription consisting of all the letters of the alphabet, usually in order.
T,u, p,i,t,o
The language with the smallest alphabet is Rotokas, spoken in Papua New Guinea, with only 12 letters.
Z is used 0.07% Q is used 0.10% J and X are tied at 0.15% (from Wikipedia)
One candidate is Rotokas, a language spoken in Papua New Guinea with just 12 letters.
the alphabet
There is no such language as Ourmukhi. If you are talking about the Gurmukhi alphabet, it's used to write the Punjabi language.
A modified version of the Arabic alphabet is used for Persian. It is the 28 letters of the Arabic alphabet, plus 4 additional letters used only in Persian.
All of the same letters as English
The English alphabet came from the Latin alphabet, but there is no real reason why there are 26 letters, except to say that every written language has at least the minimum number of letters necessary to write the language.
All letters of the alphabet are used in the English language. There are none that are excluded from common words.
The Latin alphabet used with the English and several other romance languages has 26 letters. Variations of the Latin alphabet as used by the Spanish, Polish, Swedish, and Turkish languages, and others, have a different number of letters.
The Cambodian alphabet is the world's largest alphabet, with 74 letters. The world's shortest alphabet, is Rotokas, used in the Solomon Islands, has only 12 letters. Hawaiian is the shortest alphabet for a well-known language, with 13 letters.