QUICK ANSWER
"Inglés" is a form of "inglés", a noun which is often translated as "English". "Pilar" is a noun which is often translated as "pillar". Learn more about the difference between "inglés" and "pilar" below.
el inglés(
eeng
-
glehs
)A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
1. (language)
a. English
Todos hablaban inglés, así que no necesitamos el intérprete.Everybody could speak English, so we did not need the interpreter.
This means that the noun can be masculine or feminine, depending on the gender of the noun it refers to (e.g., el doctor, la doctora).
b. Englishwoman (feminine)
Las inglesas de mi grupo tomaron té para desayunar.The Englishwomen in my group had tea for breakfast.
el pilar(
pee
-
lahr
)A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
a. pillar
La renovación de los pilares debe preservar el estilo original del edificio.The renovations of the pillars must be in keeping with the original style of the building.
b. pier (of a bridge)
El estado compró los pilares del puente a una empresa boliviana.The state bought the bridge piers from a Bolivian company.
2. (figurative) (buttress)
A phrase used as a figure of speech or a word that is symbolic in meaning; metaphorical (e.g., carrot, bean).