When advertising globally, all ads must be in the primary official language that the advertiser is located in.

This statement is false. When advertising globally, it's crucial to localize ad content, including language, to resonate with the target audience in each specific region. While an advertiser might be located in a country with a particular primary official language, their global campaigns should use the primary languages of the countries they are targeting. For example, a US-based advertiser targeting Germany would use German in their ads, not English. Using only the advertiser's local language would severely limit reach and effectiveness in international markets.