The language file in /config/locales/es.yml is incorrectly identified as EN: but should be ES: It's confusing Redmine and displaying some Spanish strings.
en:
field_question_assign_to_id: Asignar pregunta a
field_question_assigned_to_id: Pregunta asignada a
field_question_asked_by_id: Pregunta creada por
field_formatted_questions: Preguntas
label_questions: Preguntas
label_questions_for_me: Preguntas para mí
text_question: Pregunta
text_question_answered: Pregunta Respondida
text_answer: Responder
text_anyone: Cualquiera
text_question_for: Pregunta para
text_question_for_anyone: Pregunta para cualquiera
text_questions_for_me: Pregunta para mí
text_question_asked: Pregunta creada
text_question_remove: "<< Eliminar Pregunta>>"
question_text_asked_by: "Preguntada por mí"
question_text_assigned_to: "Asignada a"
question_text_created_on: "Creada el"
The language file in /config/locales/es.yml is incorrectly identified as EN: but should be ES: It's confusing Redmine and displaying some Spanish strings.