Pseudolocalization is the process of verifying application readiness to be translated. It verifies that the application UI can be easily localized to any language without making source code modifications.
Since localizability bugs have to be fixed in the source code, they must be searched at the beginning of the translation process, so this tool allows you to avoid necessity of fixing bugs for every language version at a later point.
This tool requires you to be logged in as Crowdin user. You also have to setup your Crowdin project to be able to get dummy translation for your application.