"Anyone can speak Troll. All you have to do is point and grunt."
Fred Weasley joking about Troll language[src]

Troll is a language spoken by trolls. In 1994 while inside the tent during the Quidditch World Cup Fred Weasley joked about this language, when Percy Weasley dreamingly told about Bartemius Crouch Snr's many talents, including this language. According to Fred it is a very primitive language, only consisting of grunting and pointing.

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