Sometimes it is a big advantage to write in languages other than English, it all depends on your niche and your target audience.

If I was wanting to reach a Spanish speaking market, and I spoke the language, I would convert my whole site to that language.

You can do this in your WP-Admin --> Settings --> General at the bootom of the page.

Now everything in your WP_Admin and on the Front End would be in Spanish. You could repeat this by creating a second site for your Italian audience and again for your English speakers.

althoung google have a good translator, try to write pages in native language ex. google convert well from italian to english but on the contrary the results are bad

You can have duplicate pages and focus on different language markets. Or you can make a second or third site. John

Whatever language you are more comfortable speaking in - but of course it goes without saying that it is better to use a language spoken by large populations.

I like the real "thingy" description - very techie lol

It's certainly doable but worth trying on a real thingy