When translating, we can come across with ordinal numbers, which have a recommended writing in Spanish. We use ordinals to rank things, showing what comes where in a sequence. According to Fundéu (item 6), it is recommended to avoid the borrowed format from English.
Source:
https://www.fundeu.es/recomendacion/numero-ordinales-claves-de-escritura/
Here are some examples:
1. For book editions (or other document reference), ordinal numbers tell us the version.
2. In school grades, ordinals tell us the level of education a student is at.
Writing according to RAE:
