Electronics/Multilingual Restaurant Website.
Can there be Business Benefits in designing a Multilingual Restaurant Website?.
Not unless there is customer base for the restaurant which represents a large enough other language clientele to justify the expense and web management.
In my country, USA, many cities have a predominant English speaking population. The same is true for the UK; in Brazil the predominant language is Portuguese and so on.
On the other hand, along the borders of the USA there are great populations of non-English speaking patrons. Along the southern border are large Spanish speaking people. In San Francisco there are large populations of Asians speaking Chinese, Japanese and Korean languages. Etc.
Each Restaurant must decide for itself based on those in their market. It is obvious; no rule will apply to all locations.
PS: Most of the fast food merchants, such as Burger King, McDonalds, Wendies, etc. already have various language support on their webs, at least in the USA.