IN THIS GUIDE · Translate technical evidence without changing the knowledge it is meant to prove
Start with the L-1B eligibility and application overview
Apply the translation rule for USCIS submissions
A foreign-language document submitted to USCIS must have a full English translation certified by the translator as complete and accurate, with certification of competence to translate into English. This rule does not itself impose a universal notarization requirement. Check any additional document instructions for the actual procedure. Keep the original, complete certified translation, and a glossary for internal terms. Together they let a reviewer test scope, timing, and authorship without treating an English summary as original evidence. Where a key word has no exact equivalent, explain it in a glossary and retain the original wording. Do not smooth a technical distinction away for easier reading.
Preserve technical meaning and attribution
Explain internal terms and acronyms so the work can be understood, without silently adding duties or authorship absent from the original. Distinguish an employee who reviewed a process from one who designed it. Translation quality supports accurate evidence; it does not create the specialized knowledge itself. Set out what was learned, how it was learned, which organizational process it concerns, and how the U.S. assignment uses it. A concrete task account is stronger than adjectives about importance. Ask a knowledgeable supervisor to confirm the sequence of learning and the U.S. use. That record can resolve a vague assertion without adding work that did not occur.
Keep the substantive transfer requirements clear
Show special knowledge of organizational interests and international application, or advanced knowledge of organizational processes and procedures, tied to the U.S. duties. Generally establish a continuous year of qualifying full-time foreign employment in the relevant preceding three years, a qualifying corporate relationship and continuing qualifying operations in the United States and abroad. The employee needs one qualifying continuous foreign year during the immediately preceding three years. L-1B has a cumulative five-year limit; payroll, personnel records, corporate documents, and the U.S. assignment prove separate points. A staffing calendar should also show when the employee's earlier L time accrued. It prevents a valid knowledge discussion from overlooking a separate duration limit.
Name the company-specific thing the employee knows
Identify the deliverable and why specialized knowledge specific to the petitioning employer is necessary. Describe the proposed work, including routine lookup tasks and the decisions requiring the claimed knowledge. Identify completed training and practical use of the newer system, together with gaps that remain. The L-1B record should describe the knowledge actually used to design and deliver that training, rather than presume every trainer possesses qualifying specialized knowledge. A new corporation cannot rely only on the employee’s expertise while leaving premises and financial capacity unexplained. The file should be consistent about the future worksite, client involvement and the petitioner’s continuing control. A useful first review identifies the claimed knowledge, the company material that demonstrates it, and the business reason the US operation needs that particular employee.
Sources reviewed 2026-09-07. This guide covers a preparation focus; it is not an individual eligibility assessment.