People in different parts of the United Kingdom speak English in different ways. They have different accents and use different words for some things.
You may call the shoes you wear in PE lessons 'pumps', 'daps' or 'plimsolls' depending on where you live.
These differences are called dialects, and they include ways of forming sentences that are non-standard, which means different from standard English.
For example, in some parts of the country people say 'we was', 'you was' and 'they was' instead of the standard English 'we were', 'you were' and 'they were'.
"We were thinking of buying a new car." (standard English)
"We was thinking of buying a new car." (non-standard English)
In other areas people say 'I were' instead of the standard English 'I was'.
"I was tired at the end of the match." (standard English)
"I were tired at the end of the match." (non-standard English)