What is the best way to organize english version of asp mvc site?

Question

ASP.NET

Hello!
here: site.com - there will be an English site, that is, anl - default
here: site.com/ru (ru.site.com) - the directory or subdomain has not yet decided there will be a Russian version, the option
will be database.
Guys who have experience, how to implement the second language most correctly and without hemorrhoids?
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what if you do it partially like WP:
the folder contains the localization file ru.lng, en.lng when you enter the site, the visitor's language is automatically determined and the values ​​\u200b\u200bof headers, labels, etc. are loaded from the corresponding file, there is also a button for forced switching .
I really don’t know how fast the UI will be drawn

Answer 1

Slightly off-topic, but important information:
ru.site.com is that option. I understand that the geo will be different for the Russian and English versions. When you feed the search engine, specify a different geotargeting for each 3rd level domain. This will allow search engines to understand which site is for Russia and which is for other regions and will increase PR.

Answer 2

and what if you do it partially like WP:
the folder contains the localization file ru.lng, en.lng when you enter the site, the visitor's language is automatically determined and the values ​​\u200b\u200bof headers, labels, etc. are loaded from the corresponding file, there is also a button for forced switching.
I really don’t know how fast the UI will be drawn