How to target both English and local language on the same website?

Selected answers from the Dumb SEO Questions Facebook & G+ community.

• 
  Alistair Lattimore: Yes you can, no problem at all.
  
  First thing to know is that ;Google provide guidelines for multilingual websites [1] to help you with the basics.
  
  A brief summary of what you need to do:
  
   ;* Google only uses visible content on the page to determine the language, they don't use meta tags or any other code level detection.
   ;* To avoid confusing Google, you should use only a single language on any one URL - you should not do side-by-side translations.
   ;* Do not allow Google to index automatically translated content, such as from Google Translate or a similar service. ;
   ;* The same content in different languages is not duplicate content, as such you should use self referencing rel=canonical tags as a general best practice throughout your site.
   ;* You should make sure that each language version of your content is easily discoverable/crawlable by Google. I'd recommend you link between each similar page using flags in the header of your site - it is a well established UI design principle and users will look for it.
   ;* Don't change the language for a given URL using query string arguments, such as /i-love-google/?lang=en and /i-love-google/?lang=fr. Instead use language sub-folders or sub-domains, which then allows you to geo-target those if need be.
   ;* Feel free to use the different languages in the URLs, it helps send a clear signal to both Google and users that a given page is in French if the URL itself is written in French.
   ;* Include rel=alternate hreflang=x tags [2] throughout your site to help Google understand the relationship between each of your different language URLs.
  
  [1] ;https://support.google.com/webmasters/answer/182192?hl=en#1
  [2] ;https://support.google.com/webmasters/answer/189077?hl=en
• 
  Hyderali Shaikh: Thanks a lot +Alistair Lattimore Will go through each & every step to see what can be done.
• 
  Hyderali Shaikh: Hi +Alistair Lattimore ;it'd be great if you can check out the website. Here is the URL [themarkets]dot[in]. You can see on top the tab in local lang.
  
  Thanks.