They may support communication ability but do not describe the entire company-knowledge record.
Show the expertise separately
Use actual work, training and process examples that attribute the employee’s contribution accurately. A translated manual should not be treated as proof that its translator designed or mastered every underlying method.
Keep language credentials in a secondary section and construct a separate evidence chain for specialized knowledge. Useful records may include the employee’s foreign assignments, internal training history, process materials, product versions handled, authored troubleshooting notes, and examples showing advanced familiarity with company procedures. Employer letters should explain significance without claiming that publicly available technical skill is proprietary. Payroll, contracts, and travel records must support one continuous qualifying foreign year in the relevant prior three, while ownership documents prove an eligible corporate link. For offsite work, include who assigns, supervises, and controls the services. The usual error is submitting a certificate of fluency and a translated manual while omitting how the employee learned and applied the petitioning group’s knowledge.
Hypothetical example: A control-systems technician at a L’Anse-Saint-Jean sawmill has adapted the employer’s calibration sequence across several machine generations. For a U.S. transfer, maintenance logs, version-specific training, annotated diagnostic procedures, and examples of resolved failures could demonstrate what he knows. His language certificate may explain why he can teach colleagues, but it should not replace evidence of the underlying company process. The related companies, foreign-service dates, proposed technical duties, and U.S. supervisory chain should also reconcile across the petition.