Nilotic languages are a group of languages spoken in East Africa. There are many synonyms for the term 'Nilotic language', including 'Eastern Sudanic languages', 'Nilo-Saharan languages', and 'Nile Valley languages'. These languages are mainly spoken in the Nile Valley and Sudanic regions of East Africa, and are characterized by their use of tonal inflection, vowel harmony, and suffixation. Some of the most well-known Nilotic languages include Dinka, Luo, and Maasai. These languages are known for their complexity and diversity, making them challenging but rewarding for linguists and language learners alike.