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Thanks for pointing these out. Version 1.1 now checks the argument order for the supported bare printf placeholders, while allowing named and numbered reordering. It also adds a minimum length for unchanged notices (4 characters by default), per-key exclusions for that notice only, and reusable settings. Both editions include the changes.

The printf example demonstrates the difference. Swapping two identical %s arguments still cannot be detected from the format strings alone, and full printf syntax is outside this tool's scope.

I have released an English edition of Taiyaku JSON Check, a small utility for comparing source and translated JSON files with the same keys and array positions.

It flags missing keys, blank translations and changed placeholders, and displays each finding with its key path. Nested JSON is supported. The downloaded HTML file makes no external requests and does not modify input files.

The free trial checks one pair and up to 100 strings with all checking rules. The $6 full edition checks up to 20 pairs / 50,000 strings and exports HTML and JSON review reports.

It does not translate, assess meaning, run games or implement full ICU MessageFormat. The tested environment is Chrome on Windows via local HTTP preview; direct file:// launch and other operating systems are not covered by our automated browser checks. Please try the free sample before buying.

AI assistance was used for development and documentation. No AI service is used at runtime.

Try the free sample: https://taiyaku-tools.itch.io/taiyaku-json-check

Feedback on supported file shapes or confusing findings is welcome. Please use small anonymized samples, and do not post private project text.