Localization or localisation, and represented as a numeronym as L10n, may refer to:

• Language localization, the process of translating a product into different languages or adapting a language for a specific country or region
• Internationalization and localization, the adaptation of computer software for non-native environments, especially other nations and cultures
• Game localization, refers to the preparation of video games for other locales
• Dub localization, the adaptation of a movie or television series for another audience