This study examines how governance controls can be systematically embedded into enterprise language model workflow architecture to enable compliant, auditable, and trustworthy use of language models in regulated platform environments. The problem addressed is the growing disconnect between rapid adoption of language model capabilities and the governance requirements imposed by regulatory oversight, internal risk management, and organizational accountability. The purpose of the study is to define an architectural and operational approach that integrates governance as a first-class design concern rather than as an external review or post deployment constraint. The study adopts a mixed methodological approach that combines architectural analysis, governance framework synthesis, and empirical examination of enterprise workflow control patterns. Key findings demonstrate that governance effectiveness depends on control placement within workflow orchestration layers, supported by centralized policy enforcement, traceable decision logging, and human review mechanisms. The proposed architecture introduces a governance embedded workflow model that aligns policy enforcement, auditability, and approval gates with language model execution stages. Strategically, the study contributes a reusable architectural framework that advances enterprise language model adoption while maintaining regulatory defensibility. Academically, it reframes language model deployment as a governance aware systems design problem. The conclusions emphasize that embedding governance into workflow architecture enables scalable compliance, reduces operational risk, and supports sustainable enterprise use of language models across regulated domains.