A form was submitted in the %S encoding which cannot encode all Unicode characters, so user input may get corrupted. To avoid this problem, the page should be changed so that the form is submitted in the UTF-8 encoding either by changing the encoding of the page itself to UTF-8 or by specifying accept-charset=utf-8 on the form element.
Inprimaki bat %S kodeketan bidali da, zeinak ezin dituen Unicode karaktere guztiak kodetu, beraz erabiltzaileak sartutakoa hondatu liteke. Arazo hau ekiditeko, orria aldatu beharko litzateke inprimakia UTF-8 kodeketan bidaltzeko; horretarako orriaren beraren kodeketa UTF-8ra aldatu behar da edo 'form' elementuan 'accept-charset=utf-8' zehaztu behar da.