How to optimize a multilingual website?
A multilingual website has specific problems.
It is not possible to detail all of these issues in a document like this one. In spite of it, if you respect the few following points you'll start on better footing.
Focus on subdomains:
- example.com (Spanish version)
- example.com (Italian version)
Or even better, on specific ccTLD (country code Top Left Domain):
Other solutions are less interesting.
However, it is possible to get some very interesting results with specific directories.
You will even probably get results faster if you already have a strong domain name in a given language.
Do not mix content written in different languages on a same web page. Never do that.
A domain => A URL => A content => One language.
Each domain or subdomain requires a complete SEO work.
The netlinking of each language must be developed. .
If you get a quotation from a SEO specialist who doubles their rate for almost every language, it seems pretty logic and means that they are serious providers.
Unless your goals are less important from a language to another…