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"Eso" is a form of "eso", a pronoun which is often translated as "that". "Ah" is a form of "ah", an interjection which is often translated as "ah". Learn more about the difference between "eso" and "ah" below.
eso()
A pronoun is a word that stands in for a noun (e.g., she).
ah()
An interjection is a short utterance that expresses emotion, hesitation, or protest (e.g., Wow!).
2. (used to express interrogation) (Latin America)
Regionalism used in Latin America: all the countries in South America, Central America, and the Caribbean. Does not include Spain.