- responsibility eso es incumbencia del departamento comercial [formal] that is the sales department's responsibility, the sales department is responsible for that eso no es de tu incumbencia that has nothing to do with you o/or does not concern you, that is no concern of yours
Here is a selection of useful words and phrases you will need in real-life situations while you're visiting Spain and other Spanish-speaking countries...
The Basque autonomous police force is called Ertzaintza. Its members, called ertzainas, wear a uniform of red sweaters and berets, and white jackets. Despite the Ertzaintza's wide range of responsibilities, the Guardia Civil and Policía Nacional still operate in the Basque Country.