English labor came from the Latin laborem (nominative labor) which means toil, pain, exertion, fatigue, work.
While most romance languages use, nowadays, words that came from the Latin word tripaliare —which, by the way, means to torture with a tripalium— as a translation of to work: e. g. the French travailler, Catalan treballar, Portuguese trabalhar and Spanish trabajar; the Italian word still used is lavorare.
Esperanto is a created language, so it did not evole into what it is now over time. A guy named L.L. Zamehof created to try and create peace in his little area where the tensions between Polish and Russain people were high. From this he got the nickname Doctor Hope, or Doctoro Esperanto.