How to properly localize a large product?

Question

Machine translation from one language to another

Hello. There is a large site with an application for ios, android and an embedded widget in other sites. And all these things have 1 language, English, where the phrases are 'hardcoded' into the code (very sad, but better late than never).
And the task is to start thinking about how to localize it all. Interested in good articles, books, experience on this topic. I would be very grateful for any links to any sources.
Thank you.

Answer 1

For example, for Ruby On Rails there is the I18n library, read the article rusrails.ru/rails-internationalization-i18n-api