British English starts off each paragraph with an indent. Usually four to five spaces. Another common style is TWO spaces AFTER each full-stop (vs American’s one space).
I have been doing it when writing in English since I was small.
EDIT: Chinese prose starts off each paragraph with TWO spaces, but that is two FULL spaces, mapping to four normal (or half-width) spaces. So many documents will have four spaces for Chinese indents.
EDIT 2:
Modern English typography usually indicates a new paragraph by indenting the first line. This style can be seen in the (handwritten) United States Constitution from 1787
A second common modern English style is to use no indenting, but add vertical white space to create “block paragraphs.”