UI localization: How to make your app feel native everywhere

What is UI localization?

UI localization is the process of recreating your website or software’s user interface in line with a target market’s linguistic needs, cultural nuances, and regulations. This part of your localization strategy specifically focuses on design elements like layouts, colors, button placements, and more to create a more user-friendly experience.

Why localize your website and app’s UI

That’s the main argument for UI localization. Localizing your site or app’s interface creates an experience that feels native, intuitive, and built for your users.

With UI localization, you can:

Offer ease of use

Using an app in a different language takes up a lot of mental bandwidth.

Even users who are fluent in English—whether they speak Spanish, Hindi, or Greek at home—have to spend extra effort navigating an app that isn’t in their native language.

Localizing your app removes that friction. It gives users a sense of ease and familiarity right from the first tap.

Engage users with clarity

First-time users of your app or website already feel a bit lost.

If they can’t understand what’s on the screen or have to mentally convert currencies just to make a decision, they’re more likely to give up than stick around.

Localization replaces this confusion with clarity. When your app speaks people’s language and reflects their local context, everything makes sense. That means they’re far more likely to engage, explore, and come back for more.

Gain trust and confidence

When users see their own language, dates/currencies, and cultural cues, it signals that your product was made with them in mind.

UI localization shows users you’ve done your homework. It indicates that you:

• Care enough to speak their language
• Respect their culture and norms
• Meet them where they are

That kind of effort earns trust.

7 best practices to get started with UI localization 

Here’s how to plan for and win at UI localization.

1. Prepare the groundwork for localized design

Instead of getting started with translations right away, take a step back to make your product localization-ready in the long run. You’re essentially building the foundation to make UI localization easy and scalable.

Start by identifying every bit of user-facing text that you have to localize. Think error messages, tooltips, CTA buttons, confirmation popups, and more.

Next, move these bits of text into resource files (also called strings) so they can be translated later.

And here’s the important part: add context for each string. For example, tell your translators if a phrase sits on a tiny button or needs to match a character limit. More context = Fewer mistakes and rewrites.

Here’s what localizable strings look like for different languages:

Once the text part is sorted, shift your focus to the visual side of UI localization.

Your interface should be flexible enough to support languages that take up more space (like German or Finnish). A tiny English word like “Edit” might stretch into 15+ characters elsewhere. So, make sure your pop-ups and modals have room for multi-line translations instead of cutting off.

This is also a good time to identify UI design elements that will definitely change per locale, such as:

• Reading order
• Currencies and units
• Dates, times, and numeric formats
• Colors or symbols for cultural relevance

It doesn’t mean you need to localize them right away, but it helps to know what might need adjusting later.

2. Translate with cultural relevance 

Translation is a critical piece of the UI localization puzzle. Give translators the resources and guidance to make your app feel native to the target users. Here’s how:

• Show the full picture: Capture screenshots showing where each piece of text appears in your site/app. Add notes or examples explaining how each string is used. This essential context leads to better, more accurate translations.
• Create detailed briefs: Offer a detailed brief with guidelines about tone of voice, reading level, brand terminology, and cultural sensitivities. This brief will offer clarity and create guardrails to avoid any mistakes in the translated content.
• Use translation memory: Make sure recurring phrases stay consistent with translation memories. This database will automatically suggest a translation when a saved piece of text appears. Check out how translation memory works in Lokalise:

When localizing your app UI, you can also lean on transcreation. It’s a more creative way of translating content to create the same impact and emotional appeal as the original version.

So, if you’re rolling out a holiday sale banner or launching a new feature with an in-app banner, use transcreation to create some buzz. Here’s an example:

• Swipe for savings (English): A playful phrase suggesting both swiping through an app and discovering discounts
• Deslize e economize (Portuguese): Uses rhyme and a casual tone to keep the swiping metaphor while matching the rhythm and mood
• 쓱쓱 넘기면 할인 팡팡! (Korean): A lively phrase that mimics the energetic style often used in Korean promotional language

3. Design modular UI components  

UI localization affects more than just text width. It also shapes your design’s direction, hierarchy, and symbolism. So once you’ve done the legwork to create strings and translate text, shift your focus to the design system.

An effective strategy for localizing your UI is to design modular, reusable components that automatically adapt to different languages.

Instead of hardcoding layouts or text into fixed templates, create design blocks (like cards, banners, or nav menus) that can adjust dynamically.

Start by creating bi-directional layouts to accommodate both left-to-right (LTR) and right-to-left (RTL) languages. This would include mirroring icons, paddings, and other elements.

Check out this example by Huda Beauty. The beauty brand uses a bi-directional layout that seamlessly translates the English copy into Arabic without breaking any design elements or consistency.

Next, you want to evaluate the ideal typography for your target languages.

Different languages require different visual styles, like:

• East‑Asian scripts need larger line heights
• Arabic needs stylistically appropriate Naskh font families
• Some languages need larger minimum font sizes for legibility

So, pick the right fonts based on the languages you want to target. Here are a few custom fonts created for specific languages that use symbols outside the English script:

Put simply, a modular approach lets you:

• Swap or restyle components per locale without redesigning entire screens
• Apply overall layout rules (like RTL mirroring) at the component level
• Reuse components across regions with minimal overhead

4. Localize imagery, iconography, and colors

Text is only one part of your interface. Icons, symbols, photos, and micro-interaction cues (like a thumbs-up) vary for different cultures.

Imagery is one of the key changes to make your interface feel familiar. Swap any images that don’t reflect a region’s cultural and social context. This mainly applies to websites targeting different markets. If you have such a site, plan to change the images across the board.

Another crucial factor to consider is your UI’s iconography and color palette. Gestures in icons and colors can convey a negative message. So, customize these elements for every market you’re targeting.

Allbirds’ localized website UI presents a great example here.

The footwear brand uses the same images of its shoes, but with different visuals. In these two versions, you’ll notice variations in color and icons. Both interfaces are designed to resonate more with the local audiences.  

5. Use design tools for a localization-ready UI

As we’ve established so far, UI localization is deeply rooted in design. With the right tools, you can build interfaces that scale across languages without breaking.

For starters, use tools like Figma, Sketch, or Adobe XD to create responsive layouts. That means set up your buttons, containers, and navbars to easily expand or contract based on text length. This auto layout will prevent any overflow when strings become longer.

You can also make tones for different UI properties like:

• Text alignment (text-align-ltr, text-align-rtl)
• Spacing (padding-start, padding-end)
• Icon placement (icon-leading, icon-trailing)

This makes your UI easily adaptable for different languages. Plus, your designers and developers can apply them consistently every time.

The best part? With a tool like Lokalise, it’s easy to build this design-stage localization setup. Lokalise integrates with design tools like Figma, Sketch, and Adobe XD. This creates better coordination between designers, translators, and developers to fast-track your localization workflow and preserve context without back-and-forth.

Here’s an overview of how Lokalise supports your design process:

6. Test your localized UI in action

Would you go to the office on a big presentation day without checking your outfit in the mirror? Me neither.

And that’s why you should test your localized user interface before rolling it out to your users.

Testing UI localization starts with linguistic quality assurance (LQA). Native speakers test your app to evaluate tone, fluency, and key functionality. Give them different devices and scenarios to test your app on various screen sizes, operating systems, and network conditions.

You can also work with beta testers to assess an early version of your product. These real users can catch any cultural errors and pinpoint anything they find confusing. This hands-on feedback will go a long way in improving your localized version.

Use this checklist for testing your UI:

• Ensure all labels, buttons, and menus adapt to longer strings
• Use visual diff tools to compare layouts and catch design shifts
• For languages like Arabic or Hebrew, confirm that the UI flips correctly
• Make sure local conventions are applied correctly in every region
• Swap text with longer, accented characters to check for layout breaks

7. Plan for maintenance and future upgrades

Localization is never a “set it and forget it” process. Your UI will evolve with every new release, and so will your localized interface.

You have to actively manage your localized data and handle future UI updates. Without a centralized setup to store and edit these localized strings, maintenance and upgrades could mean too much hassle and errors.

This is where Lokalise makes life easy for you.

You can build a single hub for all your user-facing strings, like buttons, modals, and messages. The tool easily integrates with your code, design, and content tools to manage everything in one place.

Plus, it’s easy to create automated workflows for:

• Importing and exporting strings
• Triggering translation tasks
• Running QA checks 

That means no manual work on spreadsheets and fewer errors.

Lokalise’s built-in QA tools simplify the testing flow. With features like automatic screenshots, in-context editing, and character limits, translators can produce more accurate output.

3 examples showing UI localization in action

Check out these three brands using UI localization to their advantage and make notes for your strategy.

1. Duolingo: Localized app UI for 22 languages 

Duolingo helps users across the world learn new languages. Since learning a new language (and building a habit) is a deeply personal experience, the brand uses localization to create a native and user-friendly interface.

The team first identifies all the text elements that need to be translated for the 22 supported languages. This is different from the text included in the course content.

The team also leans on first-hand user research to improve its messaging for every market.

For example, their research revealed that German users were less likely to enable push notifications. Based on this insight, the team refined the pop-up message to link notifications with learning goals and consistency.

The team also focuses on inclusivity, especially for languages like Spanish with gendered pronouns.

In the achievements dashboard, the English version says “Legendary.” But the Spanish version uses the more gender-neutral word “Leyenda” instead of the masculine alternative “Legendario.”

2. Spotify: Adapted app design, copy, and animation

Spotify is another app with a global user base. The localization team works with content designers to adapt the product for every target market, primarily the non-English speaking audience.

The team works on UI localization in three core ways:

• Choosing a relevant tone, style, and formatting during copy creation
• Creating flexible designs to accommodate different scripts and translations
• Thinking beyond the home base to see how different cultures would receive an idea 

One insight was that the Indian users preferred lighter themes to celebrate the festival of Diwali. So, the team changed the interface with lighter colors and vibrant posters.

Spotify’s engineering team also pays attention to the layouts for right-to-left languages like Arabic.

Besides using a mirroring layout and Arabic font, the team flipped every directional animation like this carousel of playlists.

3. Estee Lauder: Modified site’s visual theme and UI elements

Estee Lauder is a global beauty brand with a presence in over 150 countries. The brand caters to buyers in every region with a localized shopping experience.

For starters, the website shows completely different visuals for every country. These visuals differ on the basis of local preferences, spotlighting the products and offers that strike a chord with the buyers.

You’ll also notice differences in other UI elements throughout the website.

Here are two localized versions of Estée Lauder’s site targeting French and Greek users. They promote entirely different products as best sellers. The copy also varies in both versions, with variations in price points as well.

Make life easy for your users with UI localization 

Localizing your site or app’s interface creates familiarity. And familiarity makes it easy to use your product, find value, and make a purchase.

While that’s an oversimplified equation, you should know that localizing your UI can produce long-term benefits, increased revenue being one of them. So, start strategizing your localization efforts with the best practices we’ve outlined in this guide.

And when you’re ready to implement, use Lokalise to streamline all the moving parts of your process. Try it for free (without a credit card) to learn how.