What is l10n?

l10n is short for “localization.” It’s the process of adapting a product-like a website, app, or software-to fit the language, cultural norms, and legal requirements of a specific country or region. The “l” is the first letter, the “n” is the last, and the “10” in the middle stands for the ten letters between them.

Let's break it down

  • Language: Translating all text, messages, and UI elements into the target language.
  • Formatting: Changing dates, times, numbers, currencies, and addresses to match local conventions.
  • Cultural fit: Adjusting images, colors, icons, and examples so they make sense locally.
  • Legal & technical: Ensuring the product follows local laws (e.g., privacy rules) and works with regional hardware or networks. All these steps together make the product feel “native” to users in that market.

Why does it matter?

When users see a product that speaks their language and respects their customs, they trust it more, use it more often, and are more likely to buy or recommend it. Poor localization can lead to confusion, offense, or even legal trouble, which hurts a company’s reputation and revenue.

Where is it used?

  • Mobile apps (games, banking, social media)
  • Websites and e‑commerce platforms
  • Desktop software and operating systems
  • Video games and streaming services
  • Documentation, help centers, and marketing materials Basically any digital product that reaches an international audience needs l10n.

Good things about it

  • Expands market reach and opens new revenue streams.
  • Improves user satisfaction and loyalty.
  • Reduces support costs because users can solve problems in their own language.
  • Enhances brand image as culturally aware and inclusive.
  • Helps meet legal compliance in different regions.

Not-so-good things

  • Can be expensive and time‑consuming, especially for many languages.
  • Requires ongoing maintenance as content updates, new features, or legal changes occur.
  • Poorly managed l10n can cause inconsistencies, broken layouts, or mistranslations.
  • Coordination between developers, translators, and designers can be complex.
  • Over‑localization (changing too much) may dilute the original brand voice.