A "Search" functionality on a Drupal based website is a norm, but what happens if it is multi-lingual. How do you match a search string that is in French while viewing the site in English, where the French translation of a page matches up to it ??
Marriage of multi-lingual capabilities and search features provided by Apache solr and Drupal enable us to achieve this with great ease.

A pre-built demo to showcase the power and capabilities would be followed up with a quick tutorial on how to achieve this with ease.
Bonus
Adding quick language switching options with automatic IP based selection of language.