Hey Tulio,
As with most things SEO related, there's no definitive right or wrong answer to this question.
If you or any other author wants to write their blog in 2 languages, then go for it.
It's certainly not going to hurt us from a Google perspective.
The only question I have about those half/half blogs is whether they're annoying for readers of both languages?
My opinion is it's better to publish 2 posts - 1 for each language.
But yeah, just a readability opinion and nothing to do with SEO.
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Cool! It was just out of curiosity!
I only write in one language but I believe if I would write in another language I'd make two posts as well.
Thanks for the answer!
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