ICU MessageFormat guides
Step-by-step guides for ICU syntax, plural rules, and debugging workflow. Use these with the online editor, validator, and plural rules tools.
ICU MessageFormat guide
Learn placeholders, plural, select, selectordinal, and nested messages with practical patterns.
Read guide →ICU plural rules guide
Understand cardinal and ordinal categories across locales and map them to safe templates.
Read guide →ICU validator errors and fixes
Fix common ICU syntax and runtime formatting errors in JSON, ARB, and app translation files.
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