The New York City subway stations have seen a change in their signs. The N Train is now the Ñ train in stations around the city. This change, for full disclosure, is not MTA approved, but is a harmless prank to promote Hispanic Heritage Month. For some quick facts on the Hispanic community in New York City, Latinos and Hispanics are the second-largest ethnic group in New York City and it has been estimated that one in four New Yorkers are Latinos, according to data from the 2010 Census.

Buzzfeed initially reported that the idea to change the "N" to an "enie" could be inspired by Línea Ñ, which has been pushing for the city of New York to change the signs. "The honor the contribution of the Hispanic community to New York City, we propose that the name of the N line be changed annually to Ñ (Enie) Line during Hispanic Heritage Month, from September 15 - October 15," wrote Línea Ñ. "Please show your support to the Hispanic community by spreading the message."

But Z Street Art has taken to Twitter to reveal that they are responsible for changing the N signs to Ñ signs. According to their Twitter page, Z Street art is a six-month street art collaboration that promises to have one street art piece a day for six months. "Signs for the N-line of the NYC Subway, from Queens to Coney Island, were altered this morning," wrote Z Street Art on their Tumblr page. "The N-line is now the Ñ-line for the 24.28% Spanish speakers in New York City."

Adding the diacritical tilde to the letter 'N' may seem like an insignificant sign, but the enie is a part of the modern Latin alphabet and the Spanish alphabet. Pronounced "enye," the diacritical tilde represents the palatal nasal -- a type of consonant used in spoken languages. But the letter "Ñ" also has a cultural significance, as it represents Hispanic culture and the Spanish language. The letter has such a strong role in Hispanic and Latino identity that the Spanish Republican Air Force uses it for aircraft identification and CNN's Spanish language new channels incorporates the diacritical tilde over the two N's.