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After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.
Hi Carlo Del Fabbro,
You mentioned that you prefer not to use sub-directories but prefer sub-domains. To my understanding and according to Matt Cutts: http://www.youtube.com/watch?v=_MswMYk05tk subdomains and subfolders work the same way. There are some downsides with subdomains, but I do not believe they are with SEO, so it should not steer you away from using a subdomain. I am not sure why Rubix mentioned that in the post maybe ask him to clarify or get others to chime in
Hope this Helps!
Search engines and informed individuals are used to ?'s as like Takeshi said "query parameters" or "query variables". For everyone else it might look "questionable" (Sorry just had to say it 
)
Response from google: http://www.seroundtable.com/google-translate-auto-content-spam-17524.html
And yes its not okay, manual translation all the way.