Final answer:
Lexicalized signs and loan signs show the interconnectedness of languages.
Step-by-step explanation:
Lexicalized signs and loan signs provide evidence of the interconnectedness of languages. Lexicalized signs are signs that have adopted words or phrases from another language and incorporated them into their lexicon. For example, signs in the United States that include both English and Spanish words are examples of lexicalized signs. Loan signs, on the other hand, are signs that have been borrowed directly from another language. An example of a loan sign is the universal symbol for 'caution' which is a loan sign from the French language.