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You got it. You bet. Spanish is not one language with one translation from English to Spanish. It is several. The vocabulary changes so much, it may not be useful as you switch countries.
In English to Spanish translation, however, machine translation can help with specific words and some phrases in much the same way as an online dictionary, but is not yet powerful enough to cope with 'serious translation'. A computer cannot think about what the author intended and the target audience like a professional human translator.