Is multiple description meta tags valid?

Question

Is it valid to define multiple meta description with different languages? Is this valid?

Answer 1

It's not a good practice. Most probably the search engines will ignore them or even penalize you for spam.

Anyway, why would you have multiple description meta on the same page? I don't really think that your page will be in 3 languages at the same time.

I suppose you will have some language selection function or automatic selection based on user's browser language settings. Then you should output the appropriate description based on the selected language.