Sikhism is a belief system and places no restrictions on the language spoken
Sikhism is a religion, not a language. Sikhs say goodbye in whatever language they speak.
The primary language of Sikhism is Punjabi. Many Sikh scriptures and religious texts are written in Gurmukhi script, which is derived from Punjabi. Sikhism also has followers who speak other languages, but Punjabi holds special significance in Sikh religious practices.
You should always speak the common language of the place you work. If your native language is different than the common language, it is counterproductive and rude to speak it at work.
Sikh people primarily speak Punjabi, as it is the most widely spoken language in the Punjab region where Sikhism originated. However, Sikhs can also speak other languages based on their geographic location and personal background.
If you can speak Portuguese, you should speak Portuguese. If you can't, then you can try to speak your native language.
sikhs main language is panjabi
English is not the first language of India, and it should not be, because not enough people speak it as a first language.
Because that is the language that is spoken there.
You would speak the same language you spoke before you went to Great Britain. If you're asking what language you should use in Great Britain, the answer is English.
You could, but it's not polite.
To be a pediatrician in China, you would have to speak Mandarin Chinese. The local dialect of where you plan to practice medicine would also be helpful.
They speak the Jawoyn language.