It is specialized knowledge if the workflow is the company's own process and she holds it at an advanced level; it is general experience if the workflow is standard industry practice run on commercial tools. The distinction is proved by documentation, not by years served.
Company process, advanced level, provable on paper
The regulation defines specialized knowledge as special knowledge of the petitioning organization's product, service, research, equipment, techniques, management or other interests and its application in international markets, or an advanced level of knowledge or expertise in the organization's processes and procedures. A terminology-management workflow that the company designed, refined and documents internally is an organizational process. An analyst who has run it for three years, trained colleagues and onboarded clients onto it holds that process at an advanced level.
What she must not rely on is her competence with commercially available translation tools, her bilingualism or her general project skill, all of which the U.S. affiliate could hire locally and none of which is tied to the organization. Adjudicators also consider whether the knowledge is held by only a few people and whether it could be readily transferred; a company that could train a new hire on the workflow in a week undermines its own petition.
The years matter only as the period over which the advanced level was acquired.