Microsoft Advertising doesn’t translate your ads, so it's recommended that you write ads in the languages your customers speak and then use language targeting to make sure the right language appears to the right customers.
When determining if your ads are eligible to be shown to a particular search user, Microsoft Advertising first determines if your language targets allow for your ad to be shown in a particular country or region. Microsoft Advertising then considers other types of targets you may have set, such as location targets. Learn more in the Microsoft Advertising help center.
You create Microsoft Advertising language targets in campaign settings or ad group settings. The language target in an ad group overrides any campaign targets. For example, you can create a campaign that contains only ads in Spanish and targets the Spanish language, or you can create one ad group for each language you support and set a language target in each ad group.