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Localization testing checklist: What, how, and why?

Today, technological advancements have digitised almost every nook and corner of the world. Also, every information, application, or service available is created with a diverse audience in mind. Localization, language limitations, cultural differences, etc., have never kept users away from using such services. 

Localization testing is one of the crucial stages of software development. It ensures that a product works properly in various languages, cultures, and geographical areas. With the help of this comprehensive guide, you will read more about this Localization testing checklist, the tools used for localization, and the companies providing such services. 

What is a Localization testing checklist?

Localization testing considers linguistic, cultural, and geographical requirements to guarantee that a software product or application is appropriate for a particular locality or target market. A comprehensive checklist for localization testing is essential to ensuring the caliber and efficacy of the translated product. 

This checklist acts as a guide, taking testers through several steps, and is essential for confirming the software’s linguistic and cultural adaptation. A thorough localization testing checklist is essential to successfully carrying out this important step. 

Usually, the checklist consists of multiple essential elements. First and foremost, linguistic precision is crucial. The checklist should confirm that all text has been faithfully translated into the target language(s), including user interface components, error messages, help files, and content. This entails proofreading for suitable grammar, spelling, punctuation, and context. The checklist should guarantee that the localized product respects and effectively incorporates regional subtleties and sensitivities.

Why is having a Localization testing checklist important?

Localization testing is essential to ensure that a software product is tailored to a certain area’s linguistic, cultural, and legal needs. A checklist for localization testing should contain the following six essential items:

User Interface (UI) Localization

Check that any items that the user interacts with, like buttons, menus, error messages, and tooltips, are appropriately translated into the target user’s language. Examine any text expansion or truncation problems that might arise from language-to-language variations in text length. 

Cultural Adaptation

Ensure the program considers the customs, norms, and preferences of the intended user base. This covers time and date formats, measuring units, monetary symbols, and other content that may be sensitive to cultural differences. 

Functional Testing

Verify that the program functions properly in the intended locale by testing its functionality. Check that functions like character encoding support, sorting algorithms, and date computations operate as intended.

Content Localization

Verify all textual content’s accuracy and cultural appropriateness, including marketing materials, help files, and manuals. Verify that the app uses the same vocabulary and tone throughout. 

Localization of Graphics and Multimedia

Verify that all graphics, icons, audio, and video content are suitable for the intended audience and adhere to regional laws and cultural norms regarding the localization of graphics and multimedia. It must be ensured that any text incorporated in graphical elements is translated accurately. 

User Experience (UX) Testing

Assess the program’s overall usability in the intended location. Test user workflows, usability, and accessibility to find any problems that might result from linguistic or cultural variations. To determine whether the software is appropriate for the intended market, ask native speakers or local testers for their opinions.

Which are the best QA companies that provide localization testing?

Several companies have entered the market based on the demand for localization testing. However, there are a few QA companies that provide authenticated services. A few of those companies are listed below: 


A thorough localization testing checklist, including linguistic correctness, cultural suitability, user interface design, date and time formats, currency formats, and legal compliance, is provided by Testlio. To guarantee a smooth user experience for people worldwide, they also test for language support on various platforms and gadgets.

QA Information Technology

A comprehensive localization testing checklist is offered by QA InfoTech, emphasizing language correctness, cultural quirks, UI element alignment, date and time formats, handling of currencies, and localized content verification. To guarantee a consistent user experience across various locations, they also strongly emphasize testing across various locales and platforms.


Language correctness, content localization, UI element alignment, date and time formats, currency handling, and verified localized material are all covered by TestFort’s localization testing checklist. As part of their checklist, they test for language support on various gadgets and operating systems to guarantee cross-platform operation and compatibility. 


Applause offers a thorough Localization testing checklist that covers the verification of localized content, UI layout, date and time formats, cultural appropriateness, linguistic accuracy, and currency handling. To guarantee a flawless user experience for users worldwide, they also strongly emphasize testing across all platforms and devices.


A comprehensive localization testing checklist, including linguistic correctness, cultural suitability, user interface design, date, and time formats, handling of currencies, and localized content verification, is provided by AppSierra. On their checklist, they evaluate language support across a range of platforms and devices to guarantee a uniform user experience and functionality across geographical boundaries. 

List of the best Localization testing tools

Using the best tools will help you generate the best Localization testing checklist. The following are a few of the best tools used for creating such a checklist: 


This web-based translation management solution provides project management, localization testing, and collaborative translation capabilities. It works with version control systems such as GitHub and GitLab and supports several file types. 


Teams can effectively manage the translation process with Transifex, a cloud-based localization software. It has tools for project management, translation, and localization testing. Transifex connects with well-known development tools and supports various file formats.


To help teams expedite the translation process, Crowdin is a cloud-based localization management software. It provides tools for collaboration, translation, and localization testing. Crowdin is compatible with many file types and may be integrated with Bitbucket and GitHub version control systems. 


Smartling is a cloud-based translation management system made to assist companies with effectively localizing their content. It has tools for project management, translation, and localization testing. Smartling offers interfaces with well-known CMS platforms and supports a wide range of file formats.


POEditor is an online translation management system that makes business localization easier. It provides tools for collaboration, translation, and localization testing. POEditor offers an API for easy system integration and supports several file formats. 


OneSky is a cloud-based localization tool that assists companies in adapting their material for use in international markets. It has tools for project management, translation, and localization testing. OneSky offers APIs for integrating with other programs and platforms and supports various file formats.

These technologies are excellent resources for companies venturing into foreign markets since they offer all-inclusive solutions for overseeing the localization process, encompassing translation, testing, and cooperation.


Thus, with the help of this comprehensive guide, we learned that a localization testing checklist is essential. Localization testing contributes to ensuring a smooth user experience for a range of global audiences. Localization testing reduces the possibility of expensive errors and detrimental effects. Simultaneously, it improves user happiness via painstaking attention to detail and adherence to best practices. To read more informative content like this visit