Subtitled in SpanishEsperanto, una lengua para pensar mejor | David de Ugarte | TEDxMadridTranslated by Manuel OrtegaReviewed by Sebastian Betti
Subtitled in EsperantoEsperanto, lingvo por pensi pli bone: David de Ugarte at TEDxMadridTranscribed by Manuel OrtegaReviewed by Javi Garriz