Only those lower level staffs cannot speak english. Most officer level wont have this problem. To be an officer you need a degree but those clerical level only require minimum spm level and unfortunately these are the people who manned the counters. thats why english among civil servants are so bad

Many tamilians don't speak hindi yo, and northerners don't speak tamil.

What is the yindia national language? Yinglish?

Got plenty of kids that moved overseas when they were really young and grew up in a household that mainly speaks English.

Met quite a few of them. Heck would even say I'm one of them since ain't fluent in BM.

Always just ask them to speak in BM and ill reply in English

Actually yes. Many Chinese Americans have Chinese passport as well but they speak zero Chinese. They’re either born in US or migrated as a child.

China will treat them as Chinese citizens and not American citizen if they’re in China as it doesn’t recognise dual nationalities.

People who don’t speak national language is very common among overseas born citizens or migrated as a child. In the US there’s many European Americans with dual citizenships but they can’t speak their native European language. They all acquired European citizenship through their parents.

In fact, just two days ago I got to know a Korean American who doesn’t speak Korean. She recently got her citizenship by serving as a nurse in US Army after six years. But she cannot speak Korean as she grew up in the US. Her parents don’t have US citizenship or green card  that’s why she never have American citizenship either. But now that she had acquired US citizenship, all her family members get to stay in US indefinitely (I think all of them get GC through her citizenship)