If any web application is to be used globally, it becomes very crucial to incorporate the internationalization (i18n) localization(l10n).
i18n is transforming the products and services enabling the flexibility to adapt support for multiple languages, cultures, currency, date formats etc. whereas l10n is adapting the internationalized products and services for a specific region and culture.
For example, a user from Russia wants to access a website which is currently in English but if the website is internationalized and localized into Russian. As a native Russian speaker the user might not be accustomed to the English language. This is where i18n and l10n helps a lot and user feels like home.
Vivishine 