Can only speak for Russian. Yes, the suffixes for ordinal numerals are often added to numbers in written texts. Depends on context, as usual, but it's generally acceptable. There's no single typographic convention.
In computing context, things are made much more fun by the fact that ordinal numerals, being kinda-adjectives, have to agree with grammatical gender of the objects they denote. So, depending on what we're counting, 1st may be "1-ый" masc.), or "1-ая" (fem.), or "1-ое" (neut.).
I cannot possibly think of a culture that would use English suffixes for this purpose.