Final answer:
Option B, 'Every language has its slang and colloquialisms,' best supports the idea that computers struggle with translation work because they cannot easily navigate the nuances and contextual elements of languages.
Step-by-step explanation:
The correct answer to the question Which detail from the text best supports the idea that computers can't always complete translation work accurately? is option B: "Every language has its slang and colloquialisms." This detail suggests that the nuances of language, which involve slang and colloquial expressions, present challenges for computer translation. Because computers may not understand context, local expressions, or the evolution of language the way humans do, they can struggle with providing precise translations that capture the essence of original texts.
Such nuances of language require a deep understanding and adaptability which, as present in the text, might be beyond the capabilities of current translation software. The complexity of languages, including the ever-changing uses of words and their meanings as highlighted in the referenced texts, impose significant difficulties that computers may not surmount solely with algorithms and digitized knowledge.