Which language has the most letters in its alphabet?

That's a tricky question! It depends on how you define "letter" and "alphabet."

Here's why it's complicated:

* Different writing systems: Some languages use alphabets, others use syllabaries, abjads, or logographic systems. An alphabet has letters representing individual sounds, while a syllabary has symbols for syllables.

* Diacritics: Some languages use diacritics (marks added to letters) to change their pronunciation. Do these count as separate letters?

* Vowel combinations: Some alphabets treat vowel combinations (like "ae" or "ou") as single letters, while others treat them as two separate letters.

Here are some contenders for the "most letters" title:

* Kannada (India): With 49 letters, Kannada is often cited as having the largest alphabet. However, many of these are vowel combinations or consonants with different diacritics.

* Khmer (Cambodia): Khmer has 74 letters, but many are considered to be variants of other letters.

* Tamil (India): Tamil boasts 12 vowels, 18 consonants, and 21 consonant-vowel combinations for a total of 49 letters.

Ultimately, there's no definitive answer. It depends on your definition of "letter" and which language you consider to have the most diverse sound system.