What language uses the most phonemes?

It's difficult to definitively say which language uses the most phonemes, as there are a few contenders and the exact number can vary depending on how you define and count phonemes. However, some of the languages often mentioned as having a high number of phonemes include:

* !Xóõ (also known as !Kung): This language spoken in Southern Africa is often cited as having the most phonemes, with estimates ranging from 130 to 164. It has a complex system of clicks, tones, and vowel distinctions.

* Ubykh (extinct): This language, once spoken in the Caucasus region, is also often mentioned as having a high number of phonemes, with some estimates reaching 84.

* Taa (also known as ǀXam): This language spoken in Namibia is known for its complex click system and has been estimated to have ~70 phonemes.

It's important to note that these numbers are estimates, and there's ongoing debate about the exact number of phonemes in these languages. Additionally, the definition of a "phoneme" can be complex and vary across linguistic theories.

Ultimately, it's more accurate to say that these languages are among those with the highest number of phonemes, rather than definitively claiming one language has the most.