Linter that scans code for localize key usage and validates it. Additionally you can attach the appropriate reporting mechanism to see erros or warnings just right in Xcode

.package(url: "https://github.com/memoto/LocalizeChecker.git, from: "0.1.8")

Suppose you're located in the package root directory

swift run -c release check-localize \
    --sources-directory $SOURCES_PATH \
    --localized-bundle-path "$LOCALIZATION_RESOURCES_PATH/de.lproj" \
    --strictlicity warning

Package consists of the following parts:

• Data source
• Parser
• Checker
• Reporter

In fact data flow between modules happens exactly in that order.