Well the language of computer sciences and programming is English, so you'll be fine on this point
The spanish and french grammar are difficult on the same point: how to choose the tense and mood of verbs. I would add one more difficuly for the french: spelling since you don't hear every written character (so you have to remember them) while it almost never happens in spanish.
The rest of the grammar is ok, no modal verbs, no declension, the sentences are built is a pretty similar way.
Also, french and spanish vocabulary are very similar, they are both latin rooted.
there is no problem if you were not good at latin, although latin is the root of both languages, the current languages are very different from latin.