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"Dos" is a form of "dos", an adjective which is often translated as "two". "Personas" is a form of "personas", a plural noun which is often translated as "people". Learn more about the difference between "dos" and "personas" below.
dos(
dohs
)An adjective is a word that describes a noun (e.g., the big dog).
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
2. (number)
las personas(
pehr
-
soh
-
nahs
)A plural noun indicates that there is more than one person, place, thing, or idea.
a. people
Muchas personas votaron por el candidato, pero aun así perdió la elección.Many people voted for the candidate, but he still lost the election.