"诙谐的言行" can be translated as "witty remarks and behavior" or "humorous words and actions" in English.
"Witty remarks and behavior" emphasizes the cleverness and sharpness of the humor.
"Humorous words and actions" focuses more on the amusing and light-hearted nature of the言行 (words and actions).
Both translations are appropriate depending on the context and the specific nuance you want to convey.