QUICK ANSWER
"Ah" is a form of "ah", an interjection which is often translated as "ah". "Uh" is an interjection which is often translated as "este". Learn more about the difference between "ah" and "uh" below.
ah(
a
)An interjection is a short utterance that expresses emotion, hesitation, or protest (e.g. Wow!).
1. (used to express surprise or pity)
uh(
uh
)An interjection is a short utterance that expresses emotion, hesitation, or protest (e.g. Wow!).
1. (used to express uncertainty)
a. este (Latin America)
Regionalism used in Latin America: all the countries in South America, Central America, and the Caribbean. Does not include Spain.
What time are we meeting Jenna? - Uh... I'm not sure.¿A qué hora nos veremos con Jenna? - Este... no estoy segura.
b. esto (Spain)
Regionalism used in Spain
Where's my coat? - Right here. Uh... maybe not.¿Dónde está mi abrigo? - Aquí. Esto... tal vez no.
2. (used to fill space in a conversation)
a. eh
What did you do last night? - Raymond and I, uh, went to the movies.¿Qué hiciste anoche? - Raymond y yo, eh, fuimos al cine.
