nslocalizer
This is a command line tool that is used for discovering missing and unused localization strings in Xcode projects.
Contributing and Code of Conduct 
This project and related material has a Code of Conduct that is listed in the contributing.md file. This must be read and adhered to when interacting with this project. Additionally this code is released under a 3-clause BSD license that you can read here.
Requirements 
This tool is built and tested against Python 3.5.0.
| Module | Version |
|---|---|
| pbPlist | >=1.0 |
| pyobjc-core | >= 2.5.1 |
| pyobjc-framework-Cocoa | >= 2.5.1 |
| langcodes | >= 1.2.0 |
Installation
Via pip and python 3
$ pip3 install nslocalizer
To install the tool from the repo, clone from Github then run the make build command.
Usage
To use nslocalizer to generate warnings about missing or unused NSLocalizedStrings, you will have to pass it a project and target as input:
$ nslocalizer --project <path to xcodeproj file> --target <names of targets to analyze>
There are a number of flags that can be passed to modify the behavior of pyconfig:
| Flags | Usage |
|---|---|
--version |
Displays the version of nslocalizer and exits |
--find-missing |
Finds any strings that are missing translations for any of the supported languages |
--find-unused |
Finds any strings that are unused in the code |
--quiet |
Silences all logging output |
--verbose |
Logs additional information |
--ignore <languages> |
Will silence warnings for any of the languages listed to be ignored |
Note: Both
--find-missingand--find-unusedflags can be supplied to the same invocation ofnslocalizer.
Example
Find missing translation strings:
$ nslocalizer --project Foo.xcodeproj --target MyNewApp --find-missing
/Users/Samantha/Projects/Foo/Foo/Assets/Base.lproj/Localizable.strings:327: warning: String "foo_setup_twitter_integation" missing for: German, Traditional Chinese, European Portuguese, Spanish
/Users/Samantha/Projects/Foo/Foo/Assets/Base.lproj/Localizable.strings:356: warning: String "foo_setup_facebook_integation" missing for: German, Traditional Chinese, European Portuguese, Swedish, Polish, Latin American Spanish, British English, Brazilian Portuguese
Find unused translation strings:
$ nslocalizer --project Foo.xcodeproj --target MyNewApp --find-unused
/Users/Samantha/Projects/Foo/Foo/Assets/Base.lproj/Localizable.strings:327: warning: String "foo_setup_twitter_integation" is not used
/Users/Samantha/Projects/Foo/Foo/Assets/Base.lproj/Localizable.strings:356: warning: String "foo_setup_facebook_integation" is not used
Integration
nslocalizer is intended to be used as part of a build of the Xcode project file. To integrate you will have to add a new "run script" phase to your target and then invoke as such:
nslocalizer --project $PROJECT_DIR/YourProject.xcodeproj --target $TARGET_NAME --find-missing --find-unused