Language fallback simulator

Supply resources and explicit requests with locale, chain and keys. Keys are JSON Pointers. The first present value wins, including null and empty strings. There are no automatic parent-locale rules or network resource loads. At most 64 bundles, 100 requests, 16 fallback steps and 2,000 keys per request. Processing stays on your device. JSON supports up to 1,000,000 input characters, 50,000 values and 64 nesting levels. Duplicate keys and numbers that cannot survive JSON serialization exactly are rejected. Operations are limited to 100,000 comparisons, 4,000,000 JSON output characters and 8,000,000 CSV output characters. Tables show the first 200 rows; downloads preserve the complete report. CSV uses exact JSON Pointer paths and typed JSON value envelopes for spreadsheet-safe reporting. Supply resources and explicit requests with locale, chain and keys. Keys are JSON Pointers. The first present value wins, including null and empty strings. There are no automatic parent-locale rules or network resource loads. At most 64 bundles, 100 requests, 16 fallback steps and 2,000 keys per request. Up to 1,000,000 characters. Review the settings before running.