Be careful with that.
The English language is poorer than others. I see it in French, Spanish, and German. Some words are all translated the same way, whereas in French, English, and German, there are synonyms.
As far as Google is concerned, honestly, I think you run a small risk of getting your knuckles rapped if you do that. The site I recently submitted to Adsense was rejected for poor content. Half of it was translations.
Note that they were still indexed, but the ranking was miserable.
You can still use the professional version of DeepL, but check the articles again.
And to review the text, forget Grammarly: it only does English. Go for LanguageTool, a free Chrome extension that has the merit of adapting to different languages. It'll also yell at you when it spots repetitions in a paragraph.