Localization basics: A beginner’s guide

If you are new to the world of software development and product management, you probably find the jargon and processes around localization a bit confusing.

The good news is that the core idea behind it is actually pretty simple. Localization is just the art of making your app, site, or digital product feel like it was natively built for whoever is using it, no matter where they are in the world.

In this guide, we’ll cover localization basics, how it differs from other similar processes, why it matters, and how to get started with the right tools.

What is localization?

Localization, or l10n as we call it in short, is the process of adapting a product, service, or piece of content to the linguistic, cultural, and regional expectations of a specific target audience.

The term l10n is a numeronym: the number 10 represents the ten letters between the first letter, L, and the last letter, N, in the word localization.

Localization obviously involves translating text, but you most likely also need to adapt elements such as:

Language and terminology
Dates and times
Numbers and currencies
Units of measurement
User interface and layout
Cultural references
Legal and regional requirements

Localization vs. translation vs. internationalization vs. globalization

You’ll find these terms everywhere, so it’s important you know what each means. They’re related, but each describes different aspects that have to do with preparing a product for international markets.

Localization vs. translation

Translation is the process of conveying meaning from one language into another. Localization means to adapt content and the surrounding experience to a particular market.

So while translation into another language changes words, localizing the same content may also involve changing things like currency, numbers, dates, and so on. Consequently, translation is part of localization, but it isn’t the whole process.

Read more: Localization vs. translation

Localization vs. internationalization

Internationalization, abbreviated as i18n, is the process of designing and developing a product so that it can support different languages and regional conventions without having to do major architectural changes. Localization adapts that product for a specific audience, so it comes after internationalization.

Localization vs. globalization

Globalization, abbreviated as g11n, is the broader strategy of designing a business, product, or service for international markets. It can include market research, international business operations, internationalization, localization, and decisions about which countries or regions to target. Localization is just one component of a broader globalization strategy.

Read more: Globalization vs localization

Why is localization important?

One of the most important localization basics is understanding that users expect more than translated content; they want an experience that feels natural in their own language and culture. When you actually take the time to adapt a product to the language and preferences of your users, you create more accessible experiences and build trust in your brand.

One of the main benefits is that localization improves user experience. People that navigate an app, website, or software product in their preferred language, using familiar expressions, can understand its features more easily.

Businesses can reach new markets and attract a wider audience. Sometimes, a product that works well in one country doesn’t appeal to customers elsewhere, not if it doesn’t meet their expectations. Consequently, when you adapt the product content, marketing messages, and user interfaces, your offerings become more relevant to different markets.

Localization is also good at building trust and credibility. It’s well known that people feel more comfortable using a product when its language and presentation feel natural to them.

If you want to acquire new customers and retain them, this too becomes possible with localization, because they’ll be able to understand your product’s benefits, navigate its features, and complete important actions. In other words, they’re less likely to encounter language-related obstacles.

Although no one can guarantee you that localization will definitely lead to higher conversion rates or customer loyalty, it can sure remove the barriers that might otherwise affect both.

What can be localized?

You can localize more than just software interfaces. In fact, almost any customer-facing content or product component can and may actually need to be adapted:

Websites and landing pages: Navigation, headlines, product descriptions, forms, metadata, and calls to action.
Mobile and desktop applications: Menus, buttons, notifications, onboarding flows, error messages, and settings.
Software and SaaS products: Dashboards, account management, billing, help messages, and user documentation.
E-commerce stores: Product catalogs, prices, shipping information, checkout flows, and return policies.
Marketing materials: Advertisements, social media posts, email campaigns, videos, and promotional content.
Customer support resources: Help centers, FAQs, tutorials, chatbots, and support communications.
Games and interactive media: Dialogue, character names, jokes, cultural references, graphics, and gameplay-related text.

Nonetheless, you probably won’t need to adapt every single element in the same way. It all depends on your product, your target audience, and the goals you set out for the localization project.

The challenges of localization

Learning localization basics also means recognizing the obstacles. Localization tends to become more and more complicated as a product grows, more languages get added, and you have to update the content constantly. Besides translating text, you need to account for the linguistic differences, cultural expectations, technical limitations, and ongoing maintenance.

It can be challenging to deal with all the linguistic differences and context. Unfortunately, some words and expressions don’t always have direct equivalents in other languages, and their meanings can change depending on how they’re used. It’s very important that your translators understand the context, intended meaning, and audience of each piece of content.

There are some technical limitations that can complicate localization. A common businesses encounter often is that the t ranslated text differs in length from the original. This can cause problems in user interfaces designed around only one language. Buttons become too narrow, text overflows, and the menus become difficult to read, just to name a few issues. Internationalization makes a huge difference in this aspect.

Languages and cultures also differ in how they display dates, times, numbers, currencies, and units of measurement. If you use the wrong convention, you risk leaving your users confused. Then there are all the cultural references, humor, colors, images, and symbols that can have different meanings across markets too.

It can also be difficult to maintain consistency across all your languages if multiple translators and reviewers work on different parts of the same product. Without shared terminology, style guides, and clear guidelines, the same term risks being translated differently.

It can also be hard to keep your content up to date. Every new feature, interface change, or content revision comes with strings that need to be translated and reviewed. We don’t recommend handling localization manually. If you integrate localization into the development workflow, you’ll manage updates more efficiently.

How to get started with localization

Step 1: Identify your target markets

The first thing you want to do is determine which audiences you want to reach. See your existing customers are located, which markets have proven demand, what your business goals are, and which languages you can support. Remember that language and locale aren’t always interchangeable. Choose your target locales based on the needs of your audience.

Step 2: Decide what to localize first

Prioritize your content carefully. Make an inventory of your product’s content and translate the elements that have the greatest impact on users. For a software product, these are usually the core user interface, account registration and onboarding, key product features, billing and checkout, essential notifications and error messages, help documentation and customer support. Marketing content, for example, can usually wait.

Step 3: Prepare your product for localization

Before translating content, make sure your product can accommodate different languages and locales. Separate the user-facing text from application logic, use Unicode-compatible text handling, and avoid hardcoding language-specific formatting into your code. Use locale-aware functions and libraries for dates, times, numbers, currencies, and pluralization. Design layouts that accommodate different text lengths and writing directions. All this is the internationalization stage.

Step 4: Create localization guidelines

Prepare a localization kit containing the resources translators and reviewers need:

A glossary of important product and industry terms.
A style guide explaining tone of voice, formality, and writing conventions.
A list of brand names and terms that should remain untranslated.
Contextual notes and screenshots for ambiguous strings.
Guidance on placeholders, character limits, and technical constraints.

These resources your contributors make consistent decisions, even when they work on separate parts of the product.

Step 5: Choose your translation approach

Depending on your needs, you can work with professional translators, in-house linguists, community contributors, machine translation, AI translation, or a combination of these approaches.

Human translation remains valuable when accuracy, cultural nuance, and creative adaptation are very important. Machine translation and AI translation can help accelerate large or repetitive tasks, but its output still needs appropriate review. Regardless of the method, one thing’s for sure: translators/machines should have access to relevant context and terminology guidance.

Step 6: Organize your localization workflow

A translation management system (TMS) is the most useful tool for centralizing source strings, translations, language assets, contributors, and project progress. Teams can track which strings need translation, reuse existing translations where appropriate, review changes, and coordinate work across contributors. Tools like POEditor help you manage localization projects and connect translation work with your existing development processes.

Step 7: Test the localized product

Localization is not done until you check everything. You have to make sure your translated content works correctly in its intended environment. It should cover both linguistic quality and technical functionality.

Check for:

Missing or outdated translations.
Incorrect terminology or awkward phrasing.
Truncated text and overlapping interface elements.
Broken placeholders or incorrectly displayed dynamic values.
Date, time, number, and currency formatting errors.
Pluralization problems.
Right-to-left layout issues.
Cultural or regional inconsistencies.

Test complete user journeys. For instance, go through registration, checkout, password recovery, and error handling in each important locale. Automated checks can catch many technical issues, but native speakers or qualified reviewers are best at evaluating language quality and cultural appropriateness.

Step 8: Maintain and improve your localization

Your product will probably continue to change over time, so you need a repeatable way to identify new strings, update existing translations, review changes, and publish approved content. Monitor indicators like translation completion, review turnaround time, recurring localization bugs, user feedback, and engagement in target markets.

The 4 essential best practices for localization

When you’re new to localization, a few simple habits early on will save you from massive headaches later.

Never hardcode strings in your code

Hardcoding means putting user-facing text directly inside your code logic (e.g., <button>Submit Order</button>). When it’s time to translate, developers have to hunt through hundreds of files to find every piece of text. That’s a nightmare to maintain!

What to do: Pull all UI text out of your code and put it into dedicated resource files (like .json or .yaml). Replace the actual text in your code with variable identifiers called resource keys (e.g., button_submit_order). When a user switches languages, your app simply pulls the matching text for that key.

Give your translators plenty of context

The meaning of words changes entirely based on how they’re used. If a translator gets a bare list containing a single word, they might not know what meaning to choose.

What to do: Don’t send raw spreadsheets. Use your localization platform to attach screenshots, add developer notes, and explain where the string appears in the UI.

Handle plurals and variables with care

Sentence structure varies across languages. English only has two plural forms, but other languages have up to six distinct plural rules!

What to do: Use standard placeholder formats, such as ICU MessageFormat. This allows your translation system to dynamically swap in the correct wording based on the actual number.

Work smarter with translation memory and AI

It’s expensive, slow, and unnecessary to translate every single phrase from scratch. Most products reuse the exact same terms over and over again.

What to do: Use translation memory, a smart database inside your localization tool that automatically remembers previously translated strings. When a new phrase comes up, TM fills it in automatically so you never pay to translate the same sentence again.

What to look for in localization tools

The right tools make localization easier to organize. When you evaluate a localization platform, look the following capabilities:

Centralized translation management
File format support
Collaboration and permissions
Terminology management
Quality assurance
Integrations and automation
Scalability
Translation memory and other reusable language resources

How POEditor helps with localization

We now know that localization requires a lot of work to maintain consistent terminology, preserve brand voice, evaluate translation quality, and keep content up to date as a product evolves. POEditor brings all tasks together in a localization management platform that combines AI-powered tools with human expertise.

POEditor supports a wide range of file formats and integrations, so it’s easy to incorporate localization into your existing development workflows. You can connect your projects to supported repositories and other tools, automate file synchronization, and use the API to build custom workflows.

We also support translation memory and glossaries so that you can keep a consistent terminology, reuse existing translations, and reduce repetitive work.

POEditor offers AI-powered translation; you can generate translations, refine existing text, and accelerate repetitive localization tasks. Plus, you can identify potential issues with AI-powered quality evaluation.

For businesses managing frequent releases, our tool makes localization an ongoing part of product development. You can track untranslated content, manage changes, coordinate reviews, and automate parts of the workflow as your needs evolve.

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