How to say optional in different languages

You can say optional as optionnel 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 optional as opcional in the following countries: Angola; Brazil; Cabo Verde; Guinea-Bissau; Mozambique; Portugal; Sao Tome and Principe;

You can say optional as 可选的 in the following countries: China; Hong Kong; Macao; Taiwan;

You can say optional as optional in the following countries: Austria; Germany; Liechtenstein; Switzerland;

You can say optional as προαιρετικός in the following countries: Cyprus; Greece;

You can say optional as opzionale in the following countries: Italy; San Marino;

You can say optional as апцыянальны in the following countries: Belarus;

You can say optional as по избор in the following countries: Bulgaria;

You can say optional as választható in the following countries: Hungary;

You can say optional as opcjonalny in the following countries: Poland;

You can say optional as isteğe bağlı in the following countries: Turkey;

You can say optional as опціональний in the following countries: Ukraine;