Some basic difference between British English and American English
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Especially when we refer to communication in an inter-cultural context, it would be appropriate to bear in mind the differences between British English and American English. Several decades ago, Indian writing and Indian businesses were dominated by the British.
With the British influence waning and India getting globalized, Indian businesses are increasingly dealing with the US. Since good writing is all about getting the message across effectively, a good writer should use the appropriate language. It would be appropriate to use the American English while communicating with them so as to be easily understood.
Let us also look at some spelling differences between British English and American English:
Since American English is also increasingly used in multinationals and international business communication, there is a blurring of distinction between the two. Any standard dictionary also refers to both the spellings.
While the word may start with the British spelling, American spellings are also clearly stated wherever relevant. The spell check also follows the American spelling while alerting the user.