ADD LANGUAGE SWITCHING BUTTON FLAG

ADD LANGUAGE SWITCHING BUTTON FLAG

NOTE:
1. DO NOT TOUCH MENU AND PAGES PART
2. DO NOT ADD ANY TRANSLATION PLUGIN, ALL PAGES ARE TRANSLATED
3. ALL THE PAGES ARE ALREADY TRANSLATED
4. THE LANGUAGE SWITCHER SHOULD BE APPLIED IN ALL THE THEMES
5. WORDPRESS UPDATE AND THEME UPDATE SHOULD NOT AFFECT THE LANGUAGE SWITCHER