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Localizing login and password-reset pages

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User Localization vs. Browser Localization

Localization in ThingWorx is mainly based on Localization Tables and tokens which are used as a placeholder for the actual word / phrase in a particular language.

There's a blog at which is explaining in-application localization in detail.

Language preferences are however only considered by the user's settings.

For the organization login pages at http://<server>/Thingworx/FormLogin/<organizationName> there's no defined user yet. As the user has not logged in yet, ThingWorx will have no user preferences to identify the need for a specific language.

Instead the browser language is used.

The login / password-reset page is constructed at runtime via .jsp templates.

Via JavaScript the browser language is detected and language specific configuration files are considered.

When such a configuration file is present, its tokens will be used to replace the data-i18n placeholders in the .jsp files.

Customizing the login related localizations

The localization files are stored in <Tomcat>\webapps\Thingworx\Common\locales\

For each language there's a subfolder - by default this is "en" for English.

The language and therefore folder to be used will be determined by the user's browser settings.

Whatever is top in the language list will be considered first. If a folder, e.g. for German (de), French (fr) or Spanish (es) exists, ThingWorx will use this for localization.

In the folder, there's the translation-login.json file.

It holds all the tokens required for the login relevant translations / localizations.

The FormLogin.jsp holds e.g. the token [placeholder]

This is a placeholder (which means text to be overwritten in a textfield in case the textfield is empty).

The actual localization can be found in the translation-login.json going down the json object structure to "tw" > "login" > "labels" > "name" which results as Name in the English translation.

tw.login.labels.password-title would result in the following String: Password must be at least 5 characters

Creating custom languages

To create a custom language besides English, copy the en folder and rename it to the correct language short name, from Afar (aa) to Zulu (zu). A list of Language Code References can be found at

After copying the folder, open the translation-login.json and alter the resulting Strings into the correct language variant.

As soon as the correct translation-login.json is created, it will be considered for localization. No need to restart Tomcat.



Very good material to learn about Localization!~

how can I add this localized folders dynamically? I want that all my costumers will have these folders, and the FormLogin will be displayed according their language.

For now each language needs to be added manually as a folder / translation_login.json.

The language to be used will be automatically determined by the browser's language settings. If a localization file exists, it will show the translations for the currently active language.

In addition I've created KCS Article CS261827 and an enhancement request for R&D for adding more languages by default

Great, thanks! I hope they will fix it soon!

Thanks a lot, exactly what I wanted!

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‎Apr 07, 2017 03:57 AM
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