When I moved the cursor to "tardes" it translated as "afternoons" (with 's' on the end).
I wrote it as "afternoon" - without the "s" - because it felt right. Fortunately it accepted my answer.
Is there a reason why it is translated as "afternoons" with "s" when I moved my cursor over it?
first, know Spanish comes from latin like French and unlike (partially) english or german. Consonants are not 'spitted' strongly so the Spanish 't' is different from the English 't', much softer. In fact, the 'd' is very softly pronounced, and sometimes omitted (speaking), specially if the word ends in 'd' or 'ado' (sounds /ao/). Verdad is heard /verdá/ and lado is heard /lao/, though we understand it is not the correct pronuntiation.