How to say unheard-of in different languages

You can say unheard-of as du jamais vu in the following countries: Benin; Burkina Faso; Burundi; Central African Republic; Chad; Democratic Republic of the Congo; Djibouti; France; French Guiana; French Polynesia; French Southern Territories; Gabon; Guadeloupe; Guinea; Ivory Coast; Madagascar; Mali; Martinique; Mayotte; Monaco; Niger; Republic of the Congo; Reunion; Saint Barthelemy; Saint Martin; Saint Pierre and Miquelon; Senegal; Togo;

You can say unheard-of as inaudito in the following countries: Argentina; Bolivia; Chile; Colombia; Costa Rica; Cuba; Dominican Republic; Ecuador; El Salvador; Equatorial Guinea; Guatemala; Honduras; Mexico; Nicaragua; Panama; Paraguay; Peru; Spain; Uruguay; Venezuela;

You can say unheard-of as ongehoord in the following countries: Aruba; Belgium; Curacao; Netherlands; Netherlands Antilles; Sint Maarten; Suriname;

You can say unheard-of as desconhecido de in the following countries: Angola; Brazil; Cabo Verde; Guinea-Bissau; Mozambique; Portugal; Sao Tome and Principe;

You can say unheard-of as 闻所未闻 in the following countries: China; Hong Kong; Macao; Taiwan;

You can say unheard-of as unerhört in the following countries: Austria; Germany; Liechtenstein; Switzerland;

You can say unheard-of as ennenkuulumatonta in the following countries: Finland; Northern Mariana Islands;

You can say unheard-of as ανήκουστο in the following countries: Cyprus; Greece;

You can say unheard-of as senza precedenti in the following countries: Italy; San Marino;

You can say unheard-of as uhørt in the following countries: Norway; Svalbard and Jan Mayen;

You can say unheard-of as oerhörd in the following countries: Aland Islands; Sweden;

You can say unheard-of as нечуваны in the following countries: Belarus;

You can say unheard-of as нечувано in the following countries: Bulgaria;

You can say unheard-of as neslýchaný in the following countries: Czechia;

You can say unheard-of as uhørt in the following countries: Denmark;

You can say unheard-of as ennekuulmatu in the following countries: Estonia;

You can say unheard-of as ismeretlen in the following countries: Hungary;

You can say unheard-of as nedzirdēts in the following countries: Latvia;

You can say unheard-of as negirdėtas in the following countries: Lithuania;

You can say unheard-of as niespotykane in the following countries: Poland;

You can say unheard-of as неслыханно in the following countries: Russia;

You can say unheard-of as neslýchaný in the following countries: Slovakia;

You can say unheard-of as duyulmamış in the following countries: Turkey;

You can say unheard-of as нечуваний in the following countries: Ukraine;