What is "localization"
Localization, or L10n, is the process of adapting internationalized software to a specific region or language by adding locality-specific components and text translation, as well as output formatting based on the specific locality (for example, date number and formats, currency sign, etc.)
http://www.w3.org/International/questions/qa-i18n/
Heed: When it comes to geographical location, use the tag geolocation.