The Sixth Circuit has determined that the written warnings in an asylum application regarding the consequences of filing a frivolous asylum claim are sufficient; there is no requirement that an immigration judge orally repeat those warnings. The court recognized the possibility that this written warning might not suffice if an applicant did not adequately learn of it—say, because the applicant does not speak English and the person who completed the application did not pass along this information.
The full text of Khaytekov v. Garland can be found here:
https://www.opn.ca6.uscourts.gov/opinions.pdf/22a0036p-06.pdf