EnglishLanguagePack::load() validates the checked-in manifest and artifact containment, byte lengths, SHA-256 hashes, SQLite schema and integrity, solver-index checksum, stable-key digest, data version, tokenization profile, record count, and ordinal-space ID.
The returned object implements RuntimeLanguagePackInterface. It exposes language metadata and services, the storage-neutral lexical clue catalog, solver index, stable answer keys in exact global ordinal order, artifact/ordinal identity, and aggregate clue coverage. Applications and builder composition should use these accessors rather than reading catalog.sqlite, solver.idx, or language-package internals.