Safari · Bookmarks list → Edit → your saved bookmark
Chrome · ⋯ menu → Bookmarks → ⋯ beside your bookmark or press and hold → Edit
Text containing Hangul opens the Korean dictionary; other text opens the German dictionary. Korean searches allow up to 300 characters.
If the selection cannot be read, paste the copied sentence into the prompt.
If the new tab is blocked, allow pop-ups for that website.