Hi, very good translation but please make note that the term Gringo here as used in Argentina and Uruguay often is actually not a term precisely used for North Americans as it is in some other Spanish speaking countries. The term here is referring to the European immigrants who settled in Argentina and Uruguay in the 20th and 19th century. I think if you think of the context of the song it makes sense, as it was them who appropriated the Candombe and emphasized more European musical patterns/dance styles to create the tango both dance and music. So these immigrants whether Italian or German hey were called gringos, with the exception of immigrants from Spain, to separate them from the colonial population.

"En la Argentina y en el Uruguay, la palabra "gringo" se utiliza sobre todo para hacer referencia a los inmigrantes europeos que llegaron a esos países durante el siglo XIX y XX, y también para referirse a la gente del campo. En tanto, el vocablo más usual para referirse a alguna persona de nacionalidad estadounidense se utiliza el término "yanqui"."

Referring to Anglo-Saxons/North Americans doesn't really make sense at all as they have no influence on the formation of tango.

You're welcome Rosa, I've listened carefully to the song and they pronounce final Ss, also the line would be y Manuelitas que ya no están, so I think they say Manuelita