So our website supports 3 different languages (RU, EN and LT),<link rel=alternate href=http://example.com/ hreflang=lt /><link rel=alternate href=http://en.example.com/ hreflang=en /><link rel=alternate href=http://ru.example.com/ hreflang=ru />None of these variations are region specific, do my understanding is that as long as these are in every page, it will do the job?What I want to clarify though, is part with language selectors, we have 3 links like so:<a href=http://ru.example.com/ rel=alternate hreflang=x-default title=RU>RU</a><a href=http://en.example.com/ rel=alternate hreflang=x-default title=EN>EN</a><a href=http://example.com/ rel=alternate hreflang=x-default title=LT>LT</a>Did I use hreflang attribute correctly in this scenario? Or does it somehow need to reference the link tags in the header somehow?
What hreflang value, should I use for country selectors?
seo;local seo
You  have a three language versions of a URL: in this case, each language page must identify the two other language versions, including itself.  So on each language version page you  need to do this: <link rel=alternate hreflang=en href=http://en.example.com/ /> <link rel=alternate hreflang=ru href=http://ru.example.com/ /> <link rel=alternate hreflang=lt href=http://lt.example.com/ />(source)For the second snippet you shared, it is not useful for you as you already stated your web page is not region specific. However, I want to fix a small error with your code snippet in case your web page was region specific:The design is that you need to build 3 language web pages which are region specific plus you add a fourth custom web page for visitors who do not belong to any of those 3 regions. In addition, you'll have to specify the region (ISO 3166-1 alpha-2) in this case. On your custom web page you need to display the language selector.(source)