How to say serious relationship in different languages

You can say serious relationship as relation serieuse 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 serious relationship as relación seria 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 serious relationship as serieuze relatie in the following countries: Aruba; Belgium; Curacao; Netherlands; Netherlands Antilles; Sint Maarten; Suriname;

You can say serious relationship as relacionamento sério in the following countries: Angola; Brazil; Cabo Verde; Guinea-Bissau; Mozambique; Portugal; Sao Tome and Principe;

You can say serious relationship as 认真的感情 in the following countries: China; Hong Kong; Macao; Taiwan;

You can say serious relationship as ernsthafte beziehung in the following countries: Austria; Germany; Liechtenstein; Switzerland;

You can say serious relationship as vakava suhde in the following countries: Finland; Northern Mariana Islands;

You can say serious relationship as σοβαρή σχέση in the following countries: Cyprus; Greece;

You can say serious relationship as rapporto serio in the following countries: Italy; San Marino;

You can say serious relationship as seriøst forhold in the following countries: Norway; Svalbard and Jan Mayen;

You can say serious relationship as seriöst förhållande in the following countries: Aland Islands; Sweden;

You can say serious relationship as сур'ёзныя адносіны in the following countries: Belarus;

You can say serious relationship as сериозна връзка in the following countries: Bulgaria;

You can say serious relationship as vážný vztah in the following countries: Czechia;

You can say serious relationship as seriøst forhold in the following countries: Denmark;

You can say serious relationship as tõsine suhe in the following countries: Estonia;

You can say serious relationship as komoly kapcsolat in the following countries: Hungary;

You can say serious relationship as nopietnas attiecības in the following countries: Latvia;

You can say serious relationship as rimti santykiai in the following countries: Lithuania;

You can say serious relationship as poważny związek in the following countries: Poland;

You can say serious relationship as серьезные взаимоотношения in the following countries: Russia;

You can say serious relationship as vazny vztah in the following countries: Slovakia;

You can say serious relationship as ciddi ilişki in the following countries: Turkey;

You can say serious relationship as серйозні стосунки in the following countries: Ukraine;