When time traveling, it's crucial to familiarize yourself with the local language and dialect.
Don't be "that guy" who shows up in ancient Egypt speaking nothing but "Hakuna Matata."
Learn a few basic phrases like "Hail to the pharaohs" and "I'll have what they're having" to avoid drawing unwanted attention.
For more advanced time travelers, consider taking a course in ancient Sumerian or learning a few phrases in proto-English.
For those feeling particularly adventurous, consider joining the "Time Traveler's Language Exchange" group on Phrases of the Past subforum.