This is a complicated question that depends on how you define essay. If we consider an essay to be a piece of writing that presents a thesis and supporting evidence, then the answer is no - How Do You Tame a Wild Tongue does not fit this definition. However, if we think of an essay as simply meaning a attempt or effort, then the answer is yes - Gloria Anzaldúa's work can certainly be seen as an attempt to tame her wild tongue.
Anzaldúa's essay discusses the various ways in which language can be used to oppress and marginalize people. She writes about her own experience as a Chicana woman who was raised speaking Spanish but forced to learn English in order to succeed in school. Anzaldúa argues that language should be seen as something fluid and ever-changing, rather than something static and fixed. She challenges the idea that there is one correct way to use language, and instead advocates for multiple ways of expression.
In short, while How Do You Tame a Wild Tongue may not fit our traditional definition of an essay, it is certainly an important and thought-provoking piece of writing on the subject of language.