groups its nouns under three declensions. The declension of a noun tells
us nothing about the meaning. Declension is merely a convenient way of grouping
words by a common element, similar to arranging all words that start with
"B" under the "B" section of a dictionary. As such, declension is entirely
irrelevant to determining the meaning of a word or the role a word plays
in a sentence.
1st declension generally has an "A" sound in the ending.
declension generally has an "O" sound in the ending.
declension is for everything else—a somewhat mixed bag.
The declension of a noun has no significance to the meaning of the noun,
and thus no relevance in translating.