Translation software uses algorithms to recognize words and phrases and then translates them into another language. It deals with synonyms by recognizing them as different words with the same meaning, and translating them accordingly. It can also handle multiple meanings of a single word and translate it properly based on the context in which it is used. The software also has the ability to detect slang and idioms, and can accurately translate them into the target language. Additionally, the software can recognize subtle nuances and differences between similar words and phrases, and adapt its translation accordingly. Finally, it can also detect false friends, words that have the same spelling in two different languages but different meanings, and translate them accurately.