The official language of Liberia is English. According to Wikipedia, that can refer to a variety of types of English. Wikipedia also lists 21 other languages in Liberia, a country with a population of nearly four million.
The Ethnologue lists six languages in Liberia with less than 10,000 speakers:
In “Liberians not wanting to know their indigenous language” on Newsvine, writer William Togbah extolls the benefits of indigenous languages and bemoans the fact that Liberians associate indigenous language with a lack of sophistication. At the same time, he notes that the English spoken in Liberia falls short of an international standard. His proposed solution: bilingual education.
The UNESCO Interactive Atlas of the World’s Languages in Danger does not list any languages as being endangered in Liberia.