TASK DEFINITION: In this task, you are given a sentence in either Spanish or English. Your task is to determine the language of the input sentence. Input sentences can only be in Spanish or English, and they cannot be in two languages ​​at the same time.
PROBLEM: Both internal work and foreign policy rest on this principle.

SOLUTION: English

PROBLEM: We live in hope that the twentieth century, which Europe has soaked in blood, can give way to a twenty-first century in which the power, the genius and the enthusiasm of humankind can be applied to the construction of a more just, peaceful and sustainable world.

SOLUTION: English

PROBLEM: Me agradan los comentarios del Comisario sobre la Carta.

SOLUTION:
Spanish