^This not change the languaje, only the keyboard input and time settings. For do this you need install your OS in spanish. Maybe you need a dual boot english spanish in this case.
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"Two things are infinite: the universe and human stupidity; and I'm not sure about the universe.". Albert Einstein.
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Reply to saint19
Dependant on your OS, you can install language packs for Windows (I presume you use). I have and managed to convert my PC to croatian, japanese, russian and english.