This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice.
English translations of non-English language foreign applications are not always required. However, 37 CFR 1.55(g)(3) specifies three situations where an English translation may be necessary:
“An English language translation of a non-English language foreign application is not required except: (i) When the application is involved in an interference or derivation proceeding; (ii) When necessary to overcome the date of a reference relied upon by the examiner; or (iii) When specifically required by the examiner.”
If a translation is required, it must be filed with a statement certifying that the translation is accurate. This ensures that the USPTO can properly evaluate the priority claim when necessary for examination or proceedings.