My previous job was in a worldwide company: English was the language in the meeting, but sometimes people talk between them in their own just to clarify some de

My previous job was in a worldwide company: English was the language in the meeting, but sometimes people talk between them in their own just to clarify some details or because they feel more confident discussing some concepts in their mother tongue. My suggestion is not being upset and said:"Hey, I don't understand Mandarin, so please, if there is something that I should know or that is important to me, please switch to English".