Follow Google instructions here to create widget: https://translate.google.com/manager/website/
Code for head part is available in file, so place code there:
templates\bootstrap2-responsive\widgets\head.php
or in older script version:
templates\bootstrap2-responsive\components\head.php
And code for display best will be to replace current language menu, so in:
templates\bootstrap2-responsive\widgets\header_mainmenu.php
or in older script version:
- templates\bootstrap2-responsive\components\header.php
- templates\bootstrap2-responsive\components\header-filter.php
- templates\bootstrap2-responsive\components\header-slideshow.php
Replace {print_lang_menu} in above files…
If you using other template you can search thru files for {print_lang_menu}, also some additional CSS corrections may be required.