i18n-tool
Simple and Elegant Python3 i18n Library 简单, 优雅的 Python3 i18n 库
chki18n checks that your translation files agree with each other. Point it at a folder of i18n JSON, name the language everything is compared against, and it reports what is missing, what was never translated and what quietly broke.
i18n implementation as package for international applications : https://pypi.org/project/i18n-generator