We've got two types of English and even though the difference is mainly seen in spoken English, it can be possible with written words in some cases. Do you care to figure out the English style you use when writing , or doesn't matter at all to you?

My country’s official language is British English. So I have become used to speaking it and writing with it. Any other form of English expression is not it for me.

Both, it depends on the client and project requirements. However, am more in tune with British than American English