How to find duplicate keys in localizable.strings files automatically?

Question

When using localizable.strings with many entries in your XCode project you sooner or later may use a key more than once. Is it possible to let XCode find that case and issue a w

Answer 1

cut -d'=' -f1 Localizable.strings | sort | uniq -d

You looking phrases separated by equal sign, not a first word in each string.