How to identify keyboard layout (USA or UK ) ?

US English Layout

Used in the US, Canada, Australia, Puerto Rico, Guam, Philippines, Malaysia, Singapore, India, Bangladesh, Hong Kong, New Zealand, Asian and many smaller countries. Has horizontal, rectangular enter key.

US International Layout

It has an identical character set as US English but with additional Euro character and Alt Gr key instead of Alt. This is the most common layout in Poland. Has horizontal, rectangular enter key. Can be easily misidentified as US English layout.

UK English Layout

Used in the United Kingdom and Ireland.