Which language of the world has most number alphabets 84?

That's a very interesting question! There isn't a language in the world with 84 letters in its alphabet. It's important to differentiate between:

* Alphabet size: The number of unique letters in a writing system.

* Characters: Including letters, numerals, punctuation marks, and other symbols used in a writing system.

Here's why 84 letters is unlikely:

* Practicality: Having a huge number of letters would make learning and using the language extremely difficult.

* Historical precedent: Most alphabets evolved from a smaller set of symbols, and there isn't a known historical example of a writing system with 84 letters.

* Efficiency: Languages with a large number of sounds often rely on combinations of letters, rather than introducing a new letter for every sound.

The largest alphabet in common use is the Khmer alphabet used in Cambodia, with 74 letters. However, there are other writing systems with a large number of characters, such as:

* Chinese: While not technically an alphabet, the Chinese writing system uses thousands of characters, each representing a word or concept.

* Braille: This system used for the visually impaired has 63 unique combinations of dots, each representing a letter or symbol.

If you're interested in learning more about alphabets and writing systems, I encourage you to explore the fascinating world of linguistics and writing history!