Add QC-LANG-001 (language and domain) and rewrite QC-DICT-001 criterion 7

QC-LANG-001 is a cross-cutting checklist for every artifact type written in the
Product Owner's language: Language and Domain metadata, content in the stated
language and register, domain terms from the dictionary, structural vocabulary
in English, no translated twin, a language change reviewed again, and domain
terms confirmed by a competent reviewer. Ten criteria, each tagged with an
ISO/IEC 25010:2023 characteristic.

QC-DICT-001 criterion 7 no longer checks translated artifacts (there are none
under the single-file rule); it checks that the dictionary's language and domain
match the project registry. Both checklists are Proposed.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

README.md

@@ -11,6 +11,8 @@ ISO/IEC 25010:2023 quality characteristic.
   Model Canvas, BPMN, Governance, Milestones and gateways
 - Requirements and design: Use Case Diagram, Use Case, User Story, Domain Model,
   SSD, Operation Contract, Sequence Diagram, DCD, ERD, ADR
+- Cross-cutting: Language and Domain (applies to every artifact type written in
+  the Product Owner's language), Domain Dictionary
 - Source code: Python, C, C++, C#
 
 ## Use