The ICU Format

The ICU (International Components for Unicode) format is a way of handling different linguistic and cultural needs for a given localization.

Across different cultures, things like count of objects, numbers (i.e. money), gender, and dates can cause a sentence structure to change in a unique way to that language.

Additionally, you may have a dynamic value used in your localization, which would need to be handled differently based on different languages' grammar, etc.