https://ask.wireshark.org/questions/48823/change-the-gui-language
英文版设置
From the Edit (Bearbeiten) menu, -> Preferences (Einstellung), in the Appearance (Darstellung) item (or Ctrl + Shift + P), the bottom droplist sets the Language (Sprache). By default I think it follows the System Setting (Systemeinstellung verwerden).
中文版设置