Sure, here are some common critiques of Esperanto:

* **It is too European-centric.** The vocabulary and grammar of Esperanto are based on European languages, which can make it difficult for speakers of other language families to learn.
* **It is not as widely spoken as other international languages.** English and French are much more widely spoken than Esperanto, which can make it difficult to find people to speak Esperanto with.
* **It is not as natural-sounding as other languages.** Some people find the sound of Esperanto to be artificial or unnatural.

There have been a few attempts to create new international auxiliary languages that are designed to address some of the critiques of Esperanto. These include:

* **Ido:** Ido was created in 1907 by Louis de Beaufront, who was a critic of Esperanto. Ido is designed to be more regular and logical than Esperanto, and it is also designed to be more neutral in terms of its vocabulary.
* **Interlingua:** Interlingua was created in 1951 by a group of linguists. Interlingua is based on a simplified form of Latin, and it is designed to be easy to learn for speakers of Romance languages.
* **Novial:** Novial was created in 1928 by Otto Jespersen, who was a critic of both Esperanto and Ido. Novial is designed to be a compromise between Esperanto and Ido, and it is also designed to be more natural-sounding than either of those languages.

These languages have all had some success, but none of them have achieved the same level of popularity as Esperanto. This is likely due to a number of factors, including the lack of government support, the lack of native speakers, and the competition from other international languages.

Ultimately, whether or not Esperanto is a good language is a matter of opinion. There are certainly some valid critiques of the language, but there are also many people who find it to be a useful and enjoyable language to learn.
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