<prompt> Translate the following text to SwahiliThey chose the flatlands around the Rio Cobra and, in 1538, established Villa de la Vega, whose name was later changed to St. Jago de la Vega.  <response>: Mji huo ulianzishwa mwaka 1538 na mji wa Villa de la Vega, ambao baadaye ulibadilishwa jina kuwa St. Jago de la Vega. 