We are developing a multi regional and multilingual site in sitecore 8.2

We have following URL structure:

www.local.com/ar-bh
www.local.com/en-bh

www.local.com/ar-kw
www.local.com/en-kw

and following sites definition in sitecore.config

<site name="Bahrain" hostname="sitecore/" virtualFolder="/en-bh" physicalFolder="/en-bh" rootPath="/sitecore/content" startItem="/Bahrain" database="master" domain="extranet" language ="en"/>

<site name="Bahrain_Arabic" hostname="sitecore/" virtualFolder="/ar-bh" physicalFolder="/ar-bh" rootPath="/sitecore/content" startItem="/Bahrain" database="master" domain="extranet" language ="ar"/>

and

<setting name="Languages.AlwaysStripLanguage" value="false"/>

Sites are working perfectly, but I am having issues in language switcher, I need suggestion from experts what would be the optimal way to achieve this. Each regional site has two languages English and Arabic.